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) |
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Authors: | Markus Albrecht,Klaus Hü bler,Wolfgang Kaim |
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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. |
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Keywords: | Silver complexes Difluorophosphate Imidazole ligands Crystal structure |
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