The controlled synthesis of triosmium chain clusters

Abstract

The reaction of H2Os3(CO)12 with ClSnPh3 in the presence of diethylamine gives exclusively the pentametallic chain compound 1,3-ax,ax-Ph3SnOs(CO)4Os(CO)4Os(CO)4SnPh3. A similar reaction with ClAuPPh3 gives 1,3-ax,eq-Ph3PAuOs(CO)4Os(CO)4Os(CO)4AuPPh3. The di-tin compound reacts with HCl to give 1,3-ax,ax-Cl3SnOs(CO)4Os(CO)4Os(CO)4SnCl3. These products are obtained in high yield and the reactions are selective. Keywords: osmium carbonyl chain cluster complex.