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Sensitivity of silver(I) complexes of a pyrimidine-hydrazone ligand to solvent, counteranion, and metal-to-ligand ratio changes
Department of Chemistry, University of Otago.ORCID iD: 0000-0003-0028-1204
Department of Chemistry, University of Otago.
Department of Chemistry, University of Otago.ORCID iD: 0000-0003-4004-9565
Department of Chemistry, University of Otago.
2012 (English)In: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 51, no 9, p. 5070-81Article in journal (Refereed) Published
Abstract [en]

Metal complexation studies were performed with AgSO(3)CF(3) and AgBF(4) and the ditopic pyrimidine-hydrazone ligand 6-(hydroxymethyl)pyridine-2-carboxaldehyde (2-methylpyrimidine-4,6-diyl)bis(1-methylhydrazone) (1) in both CH(3)CN and CH(3)NO(2) in a variety of metal-to-ligand ratios. The resulting complexes were studied in solution by NMR spectroscopy and in the solid state by X-ray crystallography. Reacting either AgSO(3)CF(3) or AgBF(4) with 1 in either CH(3)CN or CH(3)NO(2) in a 1:1 metal-to-ligand ratio produced a double helicate in solution. This double helicate could be converted into a linear complex by increasing the metal-to-ligand ratio; however, the degree of conversion depended on the solvent and counteranion used. Attempts to crystallize the linear AgSO(3)CF(3) complex resulted in crystals with the dimeric structure [Ag(2)1(CH(3)CN)(2)](2)(SO(3)CF(3))(4) (2), while attempts to crystallize the AgSO(3)CF(3) double helicate from CH(3)CN resulted in crystals of another dimeric complex, [Ag(2)1(SO(3)CF(3))(CH(3)CN)(2)](2)(SO(3)CF(3))(2).H(2)O (3). The AgSO(3)CF(3) double helicate was successfully crystallized from a mixture of CH(3)CN and CH(3)NO(2) and had the structure [Ag(2)1(2)](SO(3)CF(3))(2).3CH(3)NO(2) (4). The linear AgBF(4) complex could not be isolated from the double helicate in solution; however, crystals grown from a solution containing both the AgBF(4) double helicate and linear complexes in CH(3)CN had the structure [Ag(2)1(CH(3)CN)(2)](BF(4))(2) (5). The AgBF(4) double helicate could only be crystallized from CH(3)NO(2) and had the structure [Ag(2)1(2)](BF(4))(2).2CH(3)NO(2) (6).

Place, publisher, year, edition, pages
2012. Vol. 51, no 9, p. 5070-81
Keywords [en]
Hydrazones/*chemistry, Ligands, Models, Molecular, Molecular Conformation, Organometallic Compounds/chemical synthesis/*chemistry, Pyrimidines/*chemistry, Silver/*chemistry, Solutions, Solvents/*chemistry
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-240970DOI: 10.1021/ic2025582ISBN: 1520-510X (Electronic) 0020-1669 (Linking) OAI: oai:DiVA.org:kth-240970DiVA, id: diva2:1275578
Note

QC 20190108

Available from: 2019-01-07 Created: 2019-01-07 Last updated: 2019-01-08Bibliographically approved

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Publisher's full texthttps://www.ncbi.nlm.nih.gov/pubmed/22494455

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