TETRAHYDROTHIOPHENE DERIVATIVES OF METAL-CARBONYL CLUSTERS

The cyclic thioether ligand tetrahydrothiophene, SC4H8, reacts with transition metal carbonyl clusters HRuCo3(CO)(12), HRuRh3(CO)(12), H4Ru4(CO)(12) and Ru-3(CO)(12) to give HRuCo3(CO)(11)(SC4H8) (1), [HRuRh3(CO)(9)](2)[SC4H8](3) (2), H2Ru4(CO)(12)(SC4H8) (3) and Ru-4(CO)(13)(SC4H8) (4), respectively. The crystal structures of the products fall into three different structural types. In 1 the tetrahydrotriophene displaces a terminal carbonyl ligand at cobalt; whereas in 2 it acts as a bridging four-electron donor to give a dimerized cluster. Both Ru-clusters have butterfly structures with tetrahydrothiophene ligand coordinated between the wingtips.