Thermal stability and reaction of chalcogen-containing metallocenic compounds with elemental chalcogens

Article abstract of DOI:10.1016/0022-328X(89)85142-3

Dissymmetrical four-membered bimetallocenacycles (t-BuC5H4)2M(μ-S)2M'-(RC5H4)2 (M, M' = Zr, Hf; R = H, t-Bu) have been prepared and found to give redistribution products in solution at 190 deg C; identification of these products shows that the reaction involves exclusive cleavage of a metal-sulfur bond.Elemental sulfur and selenium react with chalcogen-containing complexes.The reaction is shown to involve the introduction of chalcogenic species in place of the ?-ligands of the complex to give either four-membered bimetallic complexes or catenated pentachalcogen metallocenic compounds.Some examples of insertion of sulfur and tellurium into the zirconium-methyl bond are also described.