Reactions of SmI2(THF)x with [Cp'Mo(CO)3]2Hg(Cp' = C5H5- or C5Me5-): crystal and molecular structures of [(THF)4I2Sm(m-OC)Mo(CO)2(C2H5)] and [(C5Me5)Mo(CO)3]2

Abstract

The reactions of SmI2(THF)x with [Cp′Mo(CO)3]2Hg (Cp′  C5H5− or C5Me5−) in THF at ambient temperature have been investigated. In the case of [(C5H5)Mo(CO)3]2Hg, a new complex of [(THF)4I2sm(μ-OC)Mo(CO)2(C5H5)] 1 was afforded, However, in the reaction involving [(C5Me5)Mo(CO)3]2Hg the analog cannot be obtained, but instead the dimeric [C5Me5)Mo(CO)3]22. Both complexes 1 and 2 have been characterized by X-ray crystallography. In 1 the cooperative activation of CO between Sm3+ and Mo was observed. The structure of complex 1 is the first example containing the “Sm(μ-OC)Mo” fragment.