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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 molecules
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2012 (English)In: 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) Published
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.

Place, publisher, year, edition, pages
2012. Vol. 68, no 5, m131-m134 p.
Keyword [en]
Asymmetric unit, Dioxime, Double string, Nano channels, Protonated, Title compounds, Water molecule, Chelation, Hydrates, Hydrogen bonds, Ligands, Positive ions, Solvents, Stereochemistry
National Category
Chemical Sciences
URN: urn:nbn:se:kth:diva-98500DOI: 10.1107/S0108270112016435ISI: 000303437600005ScopusID: 2-s2.0-84860510765OAI: diva2:537929
Swedish Research Council
QC 20120628Available from: 2012-06-28 Created: 2012-06-27 Last updated: 2012-06-28Bibliographically approved

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Fischer, Andreas
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Applied Physical Chemistry
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