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  • 1. Aberg, V.
    et al.
    Bostrom, D.
    Fischer, Andreas
    KTH, Superseded Departments, Chemistry.
    Almqvist, F.
    Synthesis and absolute configuration of methyl(-)-(3R)-8-(4-bromophenyl)-7-(naphthalen-1-yl-methyl)-5-oxo-2,3-dihydro-5H-thiazolo 3,2-a pyridine-3-carboxylate2002In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 58, o812-o814 p.Article in journal (Refereed)
    Abstract [en]

    The title molecule, C26H20BrNO3S, contains a ring-fused 2-pyridinone framework substituted with a 4-bromo-phenyl-, a naphthalen-1-ylmethyl and a methoxycarbonyl substituent. The main goal of this work was to confirm the stereochemistry for the methoxycarbonyl substituent, which proved to be 3R. Moreover, the 4-bromophenyl substituent was shown to be rotated out of the plane of the 2-pyridinone ring, with a torsion angle of 61.2 (5)degrees. To allow the best packing arrangement, the naphthalen-1-ylmethyl substituent is positioned to mediate an intermolecular pi-pi interaction.

  • 2. Alam, Samina
    et al.
    Hasan, Mashooda
    Saeed, Sadaf
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Khan, Naeema
    cis-(9S,10S)-Methyl 1-propyl-1,2,3,4-tetrahydro-beta-carboline-3-carboxylate2008In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 64, O361-U1624 p.Article in journal (Refereed)
    Abstract [en]

    The title compound, C16H20N2O2, was synthesized from ( S)tryptophan methyl ester hydrochloride and butyraldehyde. The absolute configuration 9S, 10S was assigned on the basis of the unchanging chirality of the C9 centre. The NH group of the indole ring is involved in intermolecular N-H center dot center dot center dot O hydrogen bonding, while the NH group of the six-membered ring is not. This latter ring has a half-chair conformation.

  • 3. Alam, Samina
    et al.
    Hasan, Mashooda
    Saeed, Sadaf
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Khan, Naeema
    trans-(1R,3S)-methyl 1-methyl-1,2,3,4-tetrahydro-beta-carboline-3-carboxylate2007In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 63, O871-O872 p.Article in journal (Refereed)
    Abstract [en]

    The title compound, C14H16N2O2, was obtained from the reaction between S-tryptophan methyl ester hydrochloride and acetaldehyde. The molecule adopts a trans configuration, with the methyl and methoxycarbonyl groups located on opposite sides of the central tetrahydro-beta-carboline unit. Bifurcated intermolecular N-H...O/N hydrogen bonds link the molecules into chains.

  • 4. Alam, Samina
    et al.
    Saeed, Sadaf
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Khan, Naeema
    Methyl 2-(2-hydroxyacetamido)benzoate2010In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 66, O913-U2993 p.Article in journal (Refereed)
    Abstract [en]

    The title compound, C10H11NO4, was formed from 4,1-benzoxazepine-2,5(1H,3H)-dione and ammonia gas. Intramolecular hydrogen bonding is present between the amide N-H group and the carbonyl O atom of the ester group. The crystal structure features intermolecular O-H center dot center dot center dot O hydrogen bonds.

  • 5. Andersson, Maria
    et al.
    Janosik, Tomasz
    Shirani, Hamid
    Slätt, Johnny
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Beck, Olof
    Synthesis and bioanalytical evaluation of morphine-3-O-sulfate and morphine-6-O-sulfate in human urine and plasma using LC-MS/MS2012In: Journal of Separation Science, ISSN 1615-9306, E-ISSN 1615-9314, Vol. 35, no 3, 367-375 p.Article in journal (Refereed)
    Abstract [en]

    The aim of this work was to synthesize morphine-3-O-sulfate and morphine-6-O-sulfate for use as reference substances, and to determine the sulfate conjugates as possible heroin and morphine metabolites in plasma and urine by a validated LC-MS/MS method. Morphine-6-O-sulfate and morphine-3-O-sulfate were prepared as dihydrates from morphine hydrochloride, in overall yields of 41 and 39% with product purities of >99.5% and >98%, respectively. For bioanalysis, the chromatographic system consisted of a reversed-phase column and gradient elution. The tandem mass spectrometer was operated in the positive electrospray mode using selected reaction monitoring, of transition m/z 366.15 to 286.40. The measuring range was 5500?ng/mL for morphine-3-O-sulfate and 4.5454?ng/mL for morphine-6-O-sulfate in plasma. In urine, the measuring range was 505000?ng/mL for morphine-3-O-sulfate and 45.44544?ng/mL for morphine-6-O-sulfate. The intra-assay and total imprecision (coefficient of variation) was below 11% for both analytes in urine and plasma. Quantifiable levels of morphine-3-O-sulfate in authentic urine and plasma samples were found. Only one authentic urine sample contained a detectable level of morphine-6-O-sulfate, while no detectable morphine-6-O-sulfate was found in plasma samples.

  • 6.
    Angelin, Marcus
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Ramström, Olof
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Crystallization-induced secondary selection from a tandem driven dynamic combinatorial resolution process2008In: Journal of Organic Chemistry, ISSN 0022-3263, E-ISSN 1520-6904, Vol. 73, no 9, 3593-3595 p.Article in journal (Refereed)
    Abstract [en]

    Crystallization-induced secondary selection from a tandem driven dynamic combinatorial library is presented. In a one-pot experiment, an initial nitroaldol equilibrium was kinetically driven by a tandem reaction resulting in a subsequent dynamic library of diastereoisomers. This library was then further driven by a phase change, resulting in amplification and isolation of a highly diastereomerically enriched and synthetically interesting isoindolinone.

  • 7.
    Angelin, Marcus
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry.
    Rahm, Martin
    KTH, School of Chemical Science and Engineering (CHE), Chemistry.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry.
    Brinck, Tore
    KTH, School of Chemical Science and Engineering (CHE), Chemistry.
    Ramström, Olof
    KTH, School of Chemical Science and Engineering (CHE), Chemistry.
    Diastereoselective One-Pot Tandem Synthesis of 3-Substituted Isoindolinones: A Mechanistic Investigation2010In: Journal of Organic Chemistry, ISSN 0022-3263, E-ISSN 1520-6904, Vol. 75, no 17, 5882-5887 p.Article in journal (Refereed)
    Abstract [en]

    The mechanism of a base-catalyzed one-pot reaction of 2-cyanobenzaldehyde and primary nitroalkanes, to produce 3-substituted isoindolinones, has been investigated. A route starting with a nitroaldol (Henry) reaction, followed by a subsequent cyclization and rearrangement, was supported by intermediate analogue synthesis and DFT calculations. Direct diastereoselective crystallization from the reaction mixture was also achieved and studied for a number of substrates. Furthermore, the 3-substituted isoindolinones are an interesting group of compounds, both present important natural products, as well as being precursors to other valuable building blocks.

  • 8.
    Angelin, Marcus
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Vongvilai, Pornrapee
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Ramström, Olof
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Crystallization Driven Asymmetric Synthesis of Pyridine β-Nitroalcoholsvia Discovery-Oriented Self-Resolution of a Dynamic System2010In: European Journal of Organic Chemistry, ISSN 1434-193X, E-ISSN 1099-0690, Vol. 33, 6315-6318 p.Article in journal (Refereed)
    Abstract [en]

    The study of dynamic nitroaldol systems aided the discovery of a diastereoselective crystallization process through amplification of 2-nitro-1-(pyridine-4-yl)propan-1-ol. The phenomenon was further developed into an effective procedure for asymmetic synthesis of pyridine-nitroalcohols and several substrates were screened to this end. These results demonstrate how work with larger dynamic systems facilitates and increases the likelihood of serendipitous discoveries.

  • 9.
    Angelin, Marcus
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Vongvilai, Pornrapee
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Ramström, Olof
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Tandem driven dynamic combinatorial resolution via Henry–iminolactone rearrangement2008In: ChemComm, ISSN 1359-7345, 768-770 p.Article in journal (Refereed)
    Abstract [en]

    An unexplored type of tandem reaction is used to kinetically resolve a dynamic combinatorial library resulting in quantitative amplification of an interesting 3-substituted isoindolinone.

  • 10.
    Aziz, Baroz
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology.
    Nordström, Fredrik
    KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Transport Phenomena.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    (2/1) p-Aminobenzoic acid-Acetone SolvateManuscript (Other academic)
  • 11. Belombe, M. M.
    et al.
    Nenwa, J.
    Wankap Kouamo, J. S. T.
    Ponou, S.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
    catena-Poly[[[(oxamide dioxime-kappa N-2,N ')copper(II)]-mu-L-tartrato-kappa O-4(1),O-2:O-3,O-4] tetrahydrate]: a chiral nanochannel framework hosting solvent water molecules2012In: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 68, no 5, m131-m134 p.Article in journal (Refereed)
    Abstract [en]

    The crystal structure of the title compound, {[Cu(C4H4O6)(C2H6N4O2)].4H2O}n, contains the central CuII cation in a distorted octahedral coordination, symmetrically chelated by the two imine N atoms of a neutral oxamide dioxime (H2oxado) ligand [CuN = 1.9829 (16) angstrom] and unsymmetrically bis-chelated by two halves of the l-(+)-tartrate(2-) (tart) ligands, each half being linked to the CuII cation via the deprotonated carboxylate group and protonated hydroxy group [CuO = 1.9356 (14) and 2.4674 (13) angstrom, respectively]. The extended asymmetric unit is defined by twofold axes, one passing through the CuII cation and the centre of the oxamide dioxime (H2oxado) ligand and the another two (symmetry related) bisecting the central CC bonds of the tartrate ions. The structure is chiral, consisting of enantiomeric linear-chain polymers oriented along [001], with virtual monomeric {Cu(tart0.5)2(H2oxado)} repeat units and with the chains interleaved face-to-face into `twin pillars'. Nanochannels exist, running parallel to the c axis and bisecting a and b, which host `double strings' of solvent water molecules. Extensive hydrogen bonding (OH...O and NH...O) between the chains and solvent water molecules, together with extended ps interactions, consolidate the bulk crystal structure.

  • 12. Bergstrom, P. O.
    et al.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Kloo, Lars A.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Sebhatu, T.
    Crystal structure and physical properties of two polymorphs of ropivacaine HCl2006In: Journal of Pharmaceutical Sciences, ISSN 0022-3549, E-ISSN 1520-6017, Vol. 95, no 3, 680-688 p.Article in journal (Refereed)
    Abstract [en]

    The crystal structure of two polymorphs of ropivacaine HCl have been determined, as well as their relative stability up to 100 degrees C. A geometric restriction for a solid-state transition between the two polymorphs has been identified. The packing density along the H-bonded chains form the basis for a model explaining the kinetic crystallization of the metastable form. The difference in stability and physicochemical properties between the two polymorphs can be attributed to the difference in crystal structure.

  • 13.
    Blid, Jan
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Somfai, Peter
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Asymmetric [2,3]-Sigmatropic Rearrangement of Allylic Ammonium Ylides: Scope and Mechanistic InvestigationManuscript (Other academic)
  • 14.
    Diesen, Veronica
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
    Lousada, Claudio
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
    A hydrogen sulfate salt of chlordiazepoxide2012In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 68, no 7, o2091-o2092 p.Article in journal (Refereed)
    Abstract [en]

    Crystals of the hydrogen sulfate salt of chlordiazepoxide (systematic name: 7-chloro-Nmethyl-5-phenyl-2,3-dihydro-1H-1,4-benzodiazepin-2-iminium 4-oxide hydrogen sulfate), C 16H 15ClN 3O +·HSO 4 -, were obtained from a solution of chlordiazepoxide and sulfuric acid in methanol. The structure features chlordiazepoxide molecules that are protonated at the imine N atom. The seven-membered ring adopts a boat conformation with the CH 2 group as the prow and the two aryl C atoms as the stern. The dihedral angle between the benzene rings is 72.41 (6)°. In the crystal, the HSO 4 - anion acts as a bridging group between two chlordiazepoxide cations. The H atom of the protonated imino N forms an N - H⋯O hydrogen bond with a hydrogen sulfate ion. The anion in turn forms two hydrogen bonds, O - H⋯O with the anion as donor and N - H⋯O with the anion as acceptor, to generate an R 2 2(10) loop. Each HSO 4 - anion connects two chlordiazepoxide moieties of the same chirality.

  • 15.
    Duan, Lele
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Xu, Yunhua
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Sun, Licheng
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Isolated Seven-Coordinate Ru(IV) Dimer Complex with HOHOH (-) Bridging Ligand as an Intermediate for Catalytic Water Oxidation2009In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 131, no 30, 10397-+ p.Article in journal (Refereed)
    Abstract [en]

    With the inspiration from an oxygen evolving complex (OEC) in Photosystern II (PSII), a mononuclear Ru(II) complex with a tetradentate ligand containing two carboxylate groups has been synthesized and structurally characterized. This Ru(II) complex showed efficient catalytic properties toward water oxidation by the chemical oxidant cerium(IV) ammonium nitrate. During the process of catalytic water oxidation, Ru(III) and Ru(IV) species have been successfully isolated as intermediates. To our surprise, X-ray crystallography together with HR-MS revealed that the Ru(IV) species is a seven-coordinate Ru(IV) dimer complex containing a [HOHOH](-) bridging ligand. This bridging ligand has a short O center dot center dot center dot O distance and is hydrogen bonded to two water molecules. The discovery of this very uncommon seven-coordinate Ru(IV) dimer together with a hydrogen bonding network may contribute to a deeper understanding of the mechanism for catalytic water oxidation. It will also provide new possibilities for the design of more efficient catalysts for water oxidation, which is the key step for solar energy conversion into hydrogen by tight-driven water splitting, the ultimate challenge in artificial photosynthesis.

  • 16.
    Duan, Lele
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry.
    Wang, Lei
    KTH, School of Chemical Science and Engineering (CHE), Chemistry.
    Inge, A. Ken
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
    Zou, Xiaodong
    Sun, Licheng
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Insights into Ru-Based Molecular Water Oxidation Catalysts: Electronic and Noncovalent-Interaction Effects on Their Catalytic Activities2013In: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 52, no 14, 7844-7852 p.Article in journal (Refereed)
    Abstract [en]

    A series of Ru-bda water oxidation catalysts [Ru(bda)L-2] (H(2)bda = 2,2'-bipyridine-6,6'-dicarboxylic acid; L = [HNEt3][3-SO3-pyridine], 1; 4-(EtOOC)-pyridine, 2; 4-bromopyridine, 3; pyridine, 4; 4-methoxypyridine, 5; 4-(Me2N)-pyridine, 6; 4-[Ph(CH2)(3)]-pyridine, 7) were synthesized with election-donating/-withdrawing groups and hydro-philic/hydrophobic groups in the axial ligands. These complexes were characterized by H-1 NMR spectroscopy, high-resolution mass spectrometry, elemental analysis, and electrochemistry. In addition, complexes 1 and 6 were further identified by single crystal X-ray crystallography, revealing a highly distorted octahedral configuration of the Ru coordination sphere. All of these complexes are highly active toward Ce-IV-driven (Ce-IV = Ce(NH4)(2)(NO3)(6)) water oxidation with oxygen evolution rates up to 119 mols of O-2 per mole of catalyst per second. Their structure-activity relationship was investigated. Electron-withdrawing and noncovalent interactions (attraction) exhibit positive effect on the catalytic activity of Ru-bda catalysts.

  • 17. Ellis, W. Chadwick
    et al.
    Tran, Camly T.
    Denardo, Matthew A.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Ryabov, Alexander D.
    Collins, Terrence J.
    Design of More Powerful Iron-TAML Peroxidase Enzyme Mimics2009In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 131, no 50, 18052-+ p.Article in journal (Refereed)
    Abstract [en]

    Environmentally useful, small molecule mimics of the peroxidase enzymes must exhibit very high reactivity in water near neutral pH. Here we describe the design and structural and kinetic characterization of a second generation of iron(III)-TAML activators with unprecedented peroxidase-mimicking abilities. Iterative design has been used to remove the fluorine that led to the best performers in first-generation iron-TAMLs. The result is a superior catalyst that meets a green chemistry objective by being comprised exclusively of biochemically common elements. The rate constants for bleaching at pH 7, 9, and 11 of the model substrate, Orange 11, shows that the new Fe-III-TAML has the fastest reactivity at pH's closer to neutral of any TAML activator to date. Under appropriate conditions, the new catalyst can decolorize Orange 11 without loss of activity for at least 10 half-lives, attesting to its exceptional properties as an oxidizing enzyme mimic.

  • 18. Ellis, W. Chadwick
    et al.
    Tran, Camly T.
    Roy, Riddhi
    Rusten, Marte
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Ryabov, Alexander D.
    Blumberg, Bruce
    Collins, Terrence J.
    Designing Green Oxidation Catalysts for Purifying Environmental Waters2010In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 132, no 28, 9774-9781 p.Article in journal (Refereed)
    Abstract [en]

    We describe the synthesis, characterization, aqueous behavior, and catalytic activity of a new generation of Fe-III-TAML (tetraamido macrocycle ligand) activators of peroxides (2), variants of [Fe{(OC)(2)(o,o'-NC6H4NCO)(2)CMe2}(OH2)(-)] (2d), which have been designed to be especially suitable for purifying water of recalcitrant oxidizable pollutants. Activation of H2O2 by 2 (k(I)) as a function of pH was analyzed via kinetic studies of Orange II bleaching. This was compared with the known behavior of the first generation of Fe-III-TAMLs (1). Novel reactivity features impact the potential for oxidant activation for water purification by 2d and its aromatic ring-substituted dinitro (2e) and tetrachloro (2f) derivatives. Thus, the maximum activity for 2e occurs at pH 9, the closest yet to the EPA guidelines for drinking water (6.5-8.5), allowing 2e to rapidly activate H2O2 at pH 7.7. In water, 2e has two axial water ligands with pK(a)'s of 8.4 and 10.0 (25 degrees C). The former is the lowest for all Fe-III-TAMLs developed to date and is key to 2e's exceptional catalytic activity in neutral and slightly basic solutions. Below pH 7, 2d was found to be quite sensitive to demetalation in phosphate buffers. This was overcome by iterative design to give 2e (hydrolysis rate 2d > 100 x 2e). Mechanistic studies highlight 2e's increased stability by establishing that to demetalate 2e at a comparable rate to which H2PO4- demetalates 2d, H3PO4 is required. A critical criterion for green catalysts for water purification is the avoidance of endocrine disruptors, which can impair aquatic life. Fe-III-TAMLs do not alter transcription mediated by mammalian thyroid, androgen, or estrogen hormone receptors, suggesting that 2 do not bind to the receptors and reducing concerns that the catalysts might have endocrine disrupting activity.

  • 19. El-Sayed, I.
    et al.
    Ali, O. M.
    Fischer, Andreas
    KTH, Superseded Departments, Chemistry.
    Senning, A.
    Diels-Alder reactions of anthracenes with C-sulfonyldithioformates2003In: Heteroatom Chemistry, ISSN 1042-7163, E-ISSN 1098-1071, Vol. 14, no 2, 170-174 p.Article in journal (Refereed)
    Abstract [en]

    C-Sulfonyldithioformates (2) (R-1 = ArSO2, R 2 = ArS) readily add to anthracene and 9-methylanthracene (1) in a Diels-Alder fashion with formation of 9,10-dihydro-10,9-(epithiomethano)anthracenes (3) which in turn may suffer thermally induced elimination of arenesulfinic acid to yield the 9-anthracenedithiocarboxylic esters (4). The reactions with the unsymmetrical diene 9-methylanthracene take place in a highly stereoselective fashion.

  • 20. El-Sayed, I.
    et al.
    Hilmy, K. M. H.
    El-Kousy, S. M.
    Fischer, Andreas
    KTH, Superseded Departments, Chemistry.
    Slem, H. S.
    Synthesis of novel trithiocarbonate-S-oxides2003In: Phosphorus Sulfur and Silicon and the Related Elements, ISSN 1042-6507, E-ISSN 1563-5325, Vol. 178, no 11, 2403-2413 p.Article in journal (Refereed)
    Abstract [en]

    The oxidation of the trithiocarbonates 3 with m-chloroperoxybenzoic acid (m-CPBA) in chloroform at room temperature provides an efficient stereoselective synthesis of the (E) sulfine 4(a) and (Z) sulfine 4(b). The expected (E) and (Z) configurations of 4(a,b) were confirmed by x-ray structure determination. The Sulfines 4 were further structurally elucidated by their cycloaddition reactions with 2,3-dimethyl-1,3-butadiene in chloroform at room temperature to give the corresponding dihydrothiopyran S-oxides 5(a,b) in a quantitative yield.

  • 21. Eriksson, M.
    et al.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Lind, Johan
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Nuclear Chemistry.
    Zazzi, A.
    2R, 3S)-2,3-dibromosuccinic acid2006In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 62, O200-O201 p.Article in journal (Refereed)
    Abstract [en]

    Crystals of the title compound, C4H4Br2O4, were grown from an aqueous solution. The structure features centrosymmetric molecules, each of which forms hydrogen bonds with two adjacent acid molecules, yielding long chains.

  • 22.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    2-bromofumaric acid2006In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 62, O4190-O4191 p.Article in journal (Refereed)
    Abstract [en]

    Single crystals of 2-bromofumaric acid, C4H3BrO4, were obtained from an aqueous solution of racemic 2,3-dibromosuccinic acid and (-)-quinine. The title compound crystallizes with two molecules in the asymmetric unit. The structure is stabilized by O - H center dot center dot center dot O hydrogen bonds forming alternating chains.

  • 23.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    2-Bromomaleic acid2009In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 65, O2240-U2786 p.Article in journal (Refereed)
    Abstract [en]

    The title compound, C4H3BrO4, was obtained from a solution of meso-2,3-dibromosuccinic acid and vanadium(IV) oxide. The crystals are isostructural with chloromaleic acid and the molecule has two geometrically different carboxyl groups, one of which has delocalized C-O bonds and is essentially coplanar with the olefinic bond plane [give dihedral angle 15.08 (16)degrees], whereas the other has a localized C=O bond and forms a dihedral angle of 99.6 (3)degrees with the C C bond plane. Two symmetry-independent O-H center dot center dot center dot O hydrogen bonds link the molecules into layers parallel to the bc plane.

  • 24.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
    Chlordiazepoxide dichloromethane monosolvate2012In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368Article in journal (Refereed)
    Abstract [en]

    In the title compound (systematic name: 7-chloro-2-methyl­amino-5-phenyl-3H-1,4-benzodiazepine 4-oxide dichloro­meth­ane monosolvate), C16H14ClN3O·CH2Cl2, the seven-membered ring adopts a boat conformation with the CH2 group as the prow and the two aromatic C atoms as the stern. The dihedral angle between the benzene rings is 75.25 (6)°. The crystal structure features centrosymmetric pairs of chlordiazepoxide mol­ecules linked by pairs of N—H...O hydrogen bonds, which generate R22(12) loops.

  • 25.
    Fischer, Andreas
    KTH, Superseded Departments, Chemistry.
    Competitive coordination of the uranyl ion by perchlorate and water - The crystal structures of UO2(ClO4)(2)center dot 3 H2O and UO2(ClO4)(2)center dot 5 H2O and a redetermination of UO2(ClO4)(2)center dot 7 H2O2003In: Zeitschrift für Anorganische und Allgemeines Chemie, ISSN 0044-2313, E-ISSN 1521-3749, Vol. 629, no 6, 1012-1016 p.Article in journal (Refereed)
    Abstract [en]

    By slow evaporation of solutions containing UO2(ClO4)(2) and an excess of HClO4, single crystals of [UO2(ClO4)(2)(H2O)(3)] (1) and [UO2(H2O)(5)](ClO4)(2) (2) were obtained and their structures were determined. From similar solutions prepared from stoichiometric amounts of UO3 and perchloric acid, crystals of [UO2(H2O)(5)](ClO4)(2)(.)2H(2)O (3) were obtained. The trihydrate (monoclinic, P2(1)/c, a=545.44(1) pm, b=1811.09(5) pm, c = 1032.46(2) pm, beta=90.016(1)degrees)consists of uranyl ions, which are coordinated by two monodentate perchlorate ions and three water molecules. The pentahydrate (monoclinic, P2(1)/n, a=529.35(2) pm, b=1645.43(6) pm, c = 1480.18(6) pm, beta=99.847(1)degrees)contains uranyl ions coordinated by five water molecules. The same structural unit can be found in the heptahydrate, whose structure was re-determined (orthorhombic, Pbcn, a=920.9(3) pm, b=1067.9(3) pm, c=1445.7(3) pm). In this structure, two molecules of water of crystallization are present.

  • 26.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    D-Alanine alaninium bromide2006In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 62, O5786-O5788 p.Article in journal (Refereed)
    Abstract [en]

    The title compound, C3H7NO2+Br-center dot C3H8NO2, crystallizes from an aqueous solution of D-alanine and racemic 2,3-dibromosuccinic acid. The structure includes alaninium cations and neutral zwitterionic alanine, and displays N-H center dot center dot center dot Br, N-H center dot center dot center dot O and O-H center dot center dot center dot O hydrogen bonding.

  • 27.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Hexaaqua mu-di-mu-oxo-bis(hydroxodioxoiodate) dieuropium(III) bis(perchlorate) dihydrate2005In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 61, I262-I264 p.Article in journal (Refereed)
    Abstract [en]

    The title compound, [Eu-2(H2I2O10)(H2O)(6)](ClO4)(2) (.) 2H(2)O, is isostructural with the corresponding Pr, Sm and Gd phases. It features Eu3+ cations, which are coordinated by centrosymmetric H2I2O10 (4-) anions and water molecules, forming positively charged sheets, separated by perchlorate anions and non-coordinated water molecules.

  • 28.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Hexaaquairon(III) perchlorate trihydrate2006In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 62, I94-I95 p.Article in journal (Refereed)
    Abstract [en]

    A single crystal of commercially available 'iron(III) perchlorate hexahydrate' has been structurally characterized and shown to be hexaaquairon( III) tris( perchlorate) trihydrate, [Fe(H2O)(6)](ClO4)(3) (.) 3H(2)O. The structure contains [Fe(H2O)(6)](3+) complex ions, charge-balancing perchlorate ions and three water molecules of crystallization per Fe atom. A network of O-H (. . .) O hydrogen bonds helps to stabilize the crystal packing. Fe, Cl and one water O atom occupy special positions with site symmetries (3) over bar, 2, and 2, respectively.

  • 29.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Lithium hydrogen (RS)-phenylsuccinate2005In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 61, M320-M322 p.Article in journal (Refereed)
    Abstract [en]

    From a solution of lithium hydroxide and (RS)-phenylsuccinic acid in water, crystals of the title compound, Li+.C10H9O4-, were obtained. The basic structural feature is an approximately square-planar centrosymmetric Li2O2 unit. The Li atoms in this unit are coordinated by further O atoms, yielding a distorted tetrahedral geometry around Li.

  • 30.
    Fischer, Andreas
    KTH, Superseded Departments, Chemistry.
    Ln(2)(ClO4)(2)(H2I2O10)center dot 8 H2O (Ln = Sm, Gd), a lanthanide perchlorate mesodiperiodate forming a novel layer structure2003In: Zeitschrift für Anorganische und Allgemeines Chemie, ISSN 0044-2313, E-ISSN 1521-3749, Vol. 629, no 4, 634-636 p.Article in journal (Refereed)
    Abstract [en]

    By slow evaporation of solutions containing Ln(ClO4)(3) (Ln = Sm, Gd), H5IO6 and an excess of HClO4, crystals of the title compounds could be obtained. Their structures were determined by single-crystal X-ray diffraction. The compounds crystallize in the monoclinic crystal system, space group P2(1)/c. They contain Ln(3+) ions, which are coordinated by [H2I2O10](4-) anions forming two-dimensional, cationic networks. These are separated by perchlorate ions, forming a layered structure.

  • 31.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    (R)-1-phenylethanaminium bromide2006In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 62, O2556-O2557 p.Article in journal (Refereed)
    Abstract [en]

    The title compound, C8H12N+.Br-, was obtained from an aqueous solution of (R)-1-phenylethanamine and racemic 2,3-dibromosuccinic acid. It features a three-dimensional network of N-H center dot center dot center dot Br hydrogen bonds.

  • 32.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    (R)-1-Phenylethanaminium-(S,S)-2,3-dibromosuccinate-(R,R)-2,3-dibromosuccinic acid water (2/1/1/2)2006In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 62, O1281-O1283 p.Article in journal (Refereed)
    Abstract [en]

    From an aqueous solution of racemic 2,3-dibromosuccinic acid and (R)-1-phenylethanamine, crystals of the title compound, C8H12N+ .0.5C(4)H(2)Br(2)O(4)(2-) .0.5C(4)H(4)Br(2)O(4)(.)H(2)O, were obtained in almost quantitative yield. The structure contains both enantiomers of the starting material, dibromosuccinic acid. The S, S enantiomer is present as a dianion and the R, R enantiomer as the neutral acid; both of these components lie on twofold rotation axes. The structure features a complex two-dimensional network of hydrogen bonds.

  • 33.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Redetermination of HI3O8, an adduct of formula HIO3 center dot I2O52005In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 61, I278-I279 p.Article in journal (Refereed)
    Abstract [en]

    Crystals of commercial iodic( V) acid, HIO3, were investigated using single-crystal and powder X-ray diffraction. The crystals turned out to be HI3O8 or (HIO3I2O5)-I-. [iodic acid-diiodine pentaoxide (1/1)] instead, whose structure has been determined previously [Feikema & Vos (1966). Acta Cryst. 20, 769-777]. Redetermination of the structure gave higher precision and allowed the location of the H atom.

  • 34.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    (R)-phenylethanaminium fluoride monohydrate2006In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 62, O5834-O5835 p.Article in journal (Refereed)
    Abstract [en]

    The title compound, C8H12FN.H2O, was crystallized from an aqueous solution. The crystal structure features N-H...F, N-H...O and O-H...F hydrogen bonding.

  • 35.
    Fischer, Andreas
    KTH, Superseded Departments, Chemistry.
    Synthesis and structure of Ln(2)(H4IO6)(I2O10)center dot H3O center dot 5 H2O (Ln=Pr, Nd, Sm), a lanthanide periodate diperiodate2003In: Zeitschrift für Anorganische und Allgemeines Chemie, ISSN 0044-2313, E-ISSN 1521-3749, Vol. 629, no 2, 335-338 p.Article in journal (Refereed)
    Abstract [en]

    By slow evaporation of solutions containing Ln(ClO4)(3) (Ln = Pr, Nd, Sm), H5IO6 and an excess of HCIO4, crystals of the title compounds could be obtained. Their structures were determined by single-crystal X-ray diffraction. The compounds crystallize in the monoclinic crystal system, space group I2/a. They contain two types of periodate ions: octahedral H4IO6 groups and two crystallographically different I2O10 groups. which consist of two edge-sharing octahedra. These anions coordinate to the canons as bridging groups yielding a three-dimensional network. Together with some water of crystallization, a coordination number of 9 is achieved around the lanthanide ions with a tri-capped trigonal prismatic geometry.

  • 36.
    Fischer, Andreas
    KTH, Superseded Departments, Chemistry.
    Three modifications of Pr-2(ClO4)(2)(H2I2O10) center dot 8 H2O - A theme with variations2004In: Zeitschrift für Anorganische und Allgemeines Chemie, ISSN 0044-2313, E-ISSN 1521-3749, Vol. 630, no 2, 309-312 p.Article in journal (Refereed)
    Abstract [en]

    From solutions containing praseodymium perchlorate and periodic acid, three different modifications of [Pr-2(ClO4)(2)(H2I2O10)] . 8 H2O could be obtained. All of them crystallize in the monoclinic system, space group P2(1)/c (alpha: a = 1091.47(6), b = 728.24(4), c = 1388.84(8) pm, beta = 101.420(3)degrees; beta: a = 1169.93(3), b = 728.72(2), c = 1384.50(4) pm, beta = 112.303(2)degrees; gamma: a = 1209.56(4), b = 712.53(2), c = 1361.64(5) pm, beta = 115.691(1)degrees). The structures contain Pr3+ cations which are coordinated by [H2I2O10](4-) anions yielding two-dimensional networks. These networks are separated by ClO4- anions yielding a layered structure.

  • 37.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Trisilver(I) citrate2011In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 67, M255-U1507 p.Article in journal (Refereed)
    Abstract [en]

    Trisilver(I) citrate, 3Ag(+)center dot C6H5O73-, was obtained by evaporation of a saturated aqueous solution of the raw material that had been obtained from sodium dihydrogen citrate and silver nitrate. It features one formula unit in the asymmetric unit. There is an intramolecular O-H center dot center dot center dot O hydrogen bond between the OH group and one of the terminal carboxylate groups. Different citrate groups are linked via the three Ag+ ions, yielding a three-dimensional network with rather irregular [AgO4] polyhedra.

  • 38.
    Fischer, Andreas
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Lindsjo, M.
    gamma-HIO3 - a metastable, centrosymmetric polymorph of iodic acid2005In: Zeitschrift für Anorganische und Allgemeines Chemie, ISSN 0044-2313, E-ISSN 1521-3749, Vol. 631, no 9, 1574-1576 p.Article in journal (Refereed)
    Abstract [en]

    From solutions of chromium(III) perchlorate and periodic acid, single crystals of gamma-HIO3 were obtained and characterized by single-crystal X-ray diffraction, Raman spectroscopy and thermal analysis. The compound crystallizes in the orthorhombic crystal system, space group Pbca (a = 563.92, b = 611.10, c = 1507.16 pm). The structure is built up by dimers (HIO3)(2), which are formed by hydrogen bonds. The crystals are metastable and transform into the stable modification, alpha-HIO3, within a couple of weeks.

  • 39.
    Fischer, Andreas
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Nordström, Fredrik
    KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Transport Phenomena.
    (2/1) p-Hydroxybenzoic acid-1,4-Dioxane SolvateManuscript (Other academic)
  • 40.
    Fischer, Andreas
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Palladino, G.
    Tetra-n-butylammonium di-mu-hydroxobis dinitratodioxouranate(VI)2005In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 61, M1542-M1544 p.Article in journal (Refereed)
    Abstract [en]

    From an aqueous solution of uranyl nitrate hexahydrate and tetra-n-butylammonium nitrate, single crystals of the title compound, (C16H36N)(2)[U-2(NO3)(4)(OH)(2)O-4], were obtained. The structure features a dimeric hydroxo-bridged tetranitratodihydroxobis[ dioxouranate(VI)] dianion.

  • 41.
    Fischer, Andreas
    et al.
    KTH, Superseded Departments, Chemistry.
    Palladino, G.
    Trisodium citrate dihydrate2003In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 59, M1080-M1082 p.Article in journal (Refereed)
    Abstract [en]

    From a solution containing uranyl nitrate and sodium citrate, single crystals of trisodium citrate dihydrate, 3Na(+).C6H5O73-.-2H(2)O, were obtained. The structure consists of a complex network of citrate and sodium ions. Additionally, hydrogen bonds between the citrate ions and the water of crystallization are formed.

  • 42.
    Fischer, Andreas
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Pettersson, Henrik
    Hagfeldt, Anders
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Boschloo, Gerrit
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Physical Chemistry.
    Kloo, Lars A.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Gorlov, Mikhail
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Crystal formation involving 1-methylbenzimidazole in iodide/triiodide electrolytes for dye-sensitized solar cells2007In: Solar Energy Materials and Solar Cells, ISSN 0927-0248, E-ISSN 1879-3398, Vol. 91, no 12, 1062-1065 p.Article in journal (Refereed)
    Abstract [en]

    Nitrogen heterocyclic compounds, such as N-methylbenzimidazole (MBI), are commonly used as additives to electrolytes for dye-sensitized solar cells (DSCs), but the chemical transformation of additives in electrolyte solutions remains poorly understood. Solid crystalline compound (MBI)(6)(MBI-H+)(2)(I-)(I-3(-)) (1) was isolated from different electrolytes for DSCs containing MBI as additive. The crystal structure of I was determined by single-crystal X-ray diffraction. In the crystal structure, 1 contains neutral and protonated MBI fragments; iodide and triiodide anions form infinite chains along the crystallographic a-axis. The role of the solvent and additives in the crystallization process in electrolytes is discussed.

  • 43.
    Fischer, Andreas
    et al.
    KTH, Superseded Departments, Chemistry.
    Profir, V. M.
    A 2-propanol solvate of (RS)-phenylsuccinic acid2004In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 60, O979-O981 p.Article in journal (Refereed)
    Abstract [en]

    A solvate of (RS)-phenylsuccinic acid (RS-PSA) has been obtained from 2-propanol ( IPA). The compound, C10H10O4.C3H8O, crystallizes in the monoclinic crystal system (space group C2/c). It features molecules of the S form of the acid, one of whose carboxy groups is connected to one carboxy group of a molecule of the opposite chirality via two hydrogen bonds. The second carboxy group of the S molecule is connected to two other S molecules via the OH groups of two 2-propanol solvent molecules.

  • 44.
    Fischer, Andreas
    et al.
    KTH, Superseded Departments, Chemistry.
    Profir, V. M.
    A metastable modification of (RS)-mandelic acid2003In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 59, O1113-O1116 p.Article in journal (Refereed)
    Abstract [en]

    A metastable modification of (RS)-mandelic acid, C8H8O3, was obtained from an aqueous solution. The structure features hydrogen-bonded double chains of acid molecules, which run along the a axis of the crystal. The structure shows a close relationship to that of the pure enantiomer and differs significantly from the structure of the stable modification of the racemate. There are two molecules in the asymmetric unit.

  • 45.
    Fischer, Andreas
    et al.
    KTH, Superseded Departments, Chemistry.
    Profir, V. M.
    (RS)-Phenylsuccinic acid2003In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 59, O485-O487 p.Article in journal (Refereed)
  • 46.
    Fischer, Andreas
    et al.
    KTH, Superseded Departments, Chemistry.
    Profir, V. M.
    (S)-Phenylsuccinic acid2003In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 59, O319-O320 p.Article in journal (Refereed)
    Abstract [en]

    (S)-Phenylsuccinic acid, C10H10O4, crystallizes from water with two molecules per asymmetric unit. In the crystal structure, the carboxyl groups of each acid molecule are connected to those of adjacent molecules via hydrogen bonds; each molecule is connected to three other molecules, forming infinite chains.

  • 47.
    Fischer, Andreas
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
    Sokka, Ilia
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
    Belova, Liubov
    KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Engineering Material Physics.
    Kloo, Lars
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
    Synthesis, structure, and magnetic properties of some layered compounds based on long-chain sulfonium cations and complex cobalt and copper anions2013In: Zeitschrift für Anorganische und Allgemeines Chemie, ISSN 0044-2313, E-ISSN 1521-3749, Vol. 639, no 14, 2613-2617 p.Article in journal (Refereed)
    Abstract [en]

    Two new materials of the composition ({CH3(CH2) 15(CH3)2S}+)2[CoBr 4]2- (1) and ({CH3(CH2) 15(CH3)2S}+)2[CuBr 4]2- (2 and 3), of which the latter exists in two polymorphs, were synthesized. The materials display the synthetically targeted structures, comprising of layers of complex metal ions and layers of long-chain sulfonium cations. The crystal structures of the materials were determined. The interlayer distances are around 24 Å, with metal-metal distances about 8 Å. The magnetic properties of 1 were investigated, and the material is paramagnetic. ({CH3(CH2)15(CH3) 2S}+)2[CuBr4]2 is polymorphic. Both polymorphs crystallize with triclinic symmetry.

  • 48.
    Fischer, Andreas
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Swamy, M. T.
    Narayana, B.
    Yathirajan, H. S.
    rac-Ethyl 3-(3-bromo-2-thienyl)-2-oxo-6-(4-propoxyphenyl)cyclohex-3-ene-1-carboxyl ate2008In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 64, O2152-U2248 p.Article in journal (Refereed)
    Abstract [en]

    The racemic title compound, C22H23BrO4S, crystallizes with two molecules in the asymmetric unit. The dihedral angles between the thiophene and phenyl rings are 71.64 (17) and 73.41 (17)degrees.

  • 49.
    Fischer, Andreas
    et al.
    KTH, Superseded Departments, Chemistry.
    Szabo, Zoltan
    KTH, Superseded Departments, Chemistry.
    Sodium pentafluorouranate(IV) monohydrate, Na[UF5]center dot H2O2004In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 60, I45-I46 p.Article in journal (Refereed)
    Abstract [en]

    Na[UF5]·H2O crystallizes in the orthorhombic space group Pbcn. It contains a uranium(IV) ion, which is coordinated by nine F- ions yielding a tricapped trigonal prism. Some of the F - ions function as bridging ligands coordinating to the Na + ion. The latter is coordinated by four F- ions. Together with two molecules of water of crystallization, a distorted octahedral coordination around Na+ is obtained.

  • 50.
    Fischer, Andreas
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Yathirajan, H. S.
    Ashalatha, B. V.
    Narayana, B.
    Sarojin, B. K.
    (7RS,8SR)-ethyl 6-(1,3-benzodioxol-5-yl)-3-(3-bromo-2-thienyl)-2-oxocyclohex-3-ene-1-carboxylate2007In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 63, O3616-U4513 p.Article in journal (Refereed)
    Abstract [en]

    The title compound, C20H17BrO5S, crystallizes as a racemate. The dihedral angle between the thiophene and benzene rings is 66.91 (13)degrees.

123 1 - 50 of 132
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