Silver(I) complexation with N-donor heterocyclic ligands in the presence of boron cluster anions: Synthesis and coordination features.

A number of new binuclear Ag(I) complexes with benzimidazole derivatives and boron cluster anions [B n H n ]2− (n = 10, 12) have been obtained and structurally characterized. [Display omitted] Silver(I) complexation with boron cluster anions [B n H n ]2− (n = 10, 12) and chelating 1-substituted-2-aldiminebenzimidazoles 1-(1-methylbenzimidazol-2-yl)- N -phenylmetanimine (L1) and 1-(1-benzylbenzimidazol-2-yl)- N -cyclohexylmethanimine (L2) in systems AgNO 3 /[B n H n ]2−/L and {Ag 2 [B n H n ]} m /L, as well as with azaheterocyclic ligands 2,2ʹ-bipyridine (bipy) or 1,10-phenanthroline (phen) in the system AgNO 3 /[B n H n ]2−/L has been first studied. The effect of the organic ligand on the composition and structures of the resulting compounds has been shown. As a result, binuclear complexes [Ag 2 L 2 [μ–B n H n ]] with bridging boron cluster anions with various combinations of coordination modes (edge-edge and edge-face for the [B 10 H 10 ]2− anion, edge–atom and nontrivial asymmetric for the [B 12 H 12 ]2− anion) have been synthesized and structurally characterized for benzimidazole derivatives L1 and L2. When using bipy or phen as ligands, polymeric complexes {Ag 2 L[B 10 H 10 ]} m or {Ag 2 L 2 [μ-B 12 H 12 ]} m have been obtained. [ABSTRACT FROM AUTHOR]