Mixed-ligand polymeric and binuclear silver(I) complexes with the decahydro-closo-decaborate anion and azaheterocyclic ligands L (L = bipy, phen, bpa)

Abstract Mixed-ligand polymeric and binuclear silver(I) complexes with azaheterocyclic ligands and the closo -decaborate anion of the composition [Ag 2 L[B 10 H 10 ]] n and [Ag 2 L 2 [B 10 H 10 ]] (L = bipy, bpa, and phen) are synthesized and studied by IR-spectroscopy and X-ray powder diffraction. The complexes are prepared by the reaction between [Ag 2 [B 10 H 10 ]] and ligand L in organic solvents. It is found that polymeric and binuclear complexes are selectively formed depending on the solvent used. When the reaction proceeds in acetonitrile, polymeric complexes are isolated. When DMF is used, binuclear complexes are formed which explains by the complete dissociation of the starting [Ag 2 [B 10 H 10 ]] complex. The structures of [Ag 2 (bipy)[B 10 H 10 ]] n and [Ag 2 (bpa) 2 [B 10 H 10 ]]·DMF are determined by X-ray diffraction.