One- or two-dimensional organometallic arrays containing PdIr 2(μ 3-S) 2 mixed-metal sulfido cluster units connected via the nicotinamide or isonicotinamide ligands on their Pd sites through hydrogen-bonding interactions

Abstract

Mixed-metal sulfido cluster [(PdCl 2)(Cp*Ir) 2(μ 3-S) 2] (Cp*=η 5-C 5Me 5) dissolved in CH 2Cl 2 reacted with two equivalent of L (L=nicotinamide, isonicotinamide, or N-methylnicotinamide) in the presence of AgBF 4 to give the cationic clusters [(PdL 2)(Cp*Ir) 2(μ 3-S) 2][BF 4] 2. The single-crystal X-ray diffraction studies of these products have disclosed that in the solid state the PdIr 2S 2 cores are self-assembled to form one-dimensional chains through the intermolecular hydrogen-bonding between the amide groups for L=nicotinamide or two-dimensional sheets via the hydrogen-bonding between the amide groups and the BF 4 anions for L=isonicotinamide, whereas no organization of the cluster cores is observed for L= N-methylnicotinamide.