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Syntheses,Structures, and Properties of the Complexes [Ag(N∧S)n](X), N∧S = 1‐Methyl‐2‐(alkylthiomethyl)‐1H‐benzimidazoles,X = PF6 (n = 2) or PO2F2 (n = 1)
Authors:Markus Albrecht  Klaus Hübler  Wolfgang Kaim
Abstract:The complexes Ag(η2‐N∧S)2](PF6), N∧S = 1‐methyl‐2‐(methylthiomethyl)‐1H‐benzimidazole, mmb (complex 1 ) or 1‐methyl‐2‐(tert‐butylthiomethyl)‐1H‐benzimidazole, mtb (complex 2 ), and Ag(μ,η2‐mmb)(μ,η2‐O2PF2)] (complex 3 ) were synthesized and characterized by X‐ray crystallography. Long Ag–S (ca. 2.70 Å) and shorter Ag–N bonds (ca. 2.23 Å) are part of characteristically distorted tetrahedral coordination arrangements at the silver(I) ions in 1 and 2 . Unexpectedly, the comparison with the copper analogue Cu(η2‐mmb)2](PF6) reveals a more tetrahedral and less linear coordination arrangement for the corresponding silver species. Compound 3 as obtained by hydrolysis of the PF6 ion or by the use of AgPO2F2 exhibits bridging mmb and η2‐difluorophosphate ligands in a chain‐type structure.
Keywords:Silver complexes  Difluorophosphate  Imidazole ligands  Crystal structure
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