MEHRFACHBINDUNGEN ZWISCHEN HAUPTGRUPPENELEMENTEN UND UEBERGANGSMETALLEN XVIII. HETEROMETALLISCHE SELENIDO-KOMPLEXE

Article abstract of DOI:10.1016/0022-328X(85)80270-9

The selenium bridge present in the iron complex (μ-Se)<(η⁵-C5H5)Fe(CO)2>2 (1) exhibits nucleophilic character and is thus prone to addition reactions with electrophilic reagents.Treatment of 1 with the coordinatively unsaturated fragment (η⁵-C5H5)Mn(CO)2 results in formation of the heteronuclear complex (η⁵-C5H5)3Fe2MnSe(CO)6 (2) which contains a flattened pyramidal Fe2MnSe core, with the selenium atom occupying the top of position of this framework.No FeMn and FeFe bonds are present in this molecule (single crystal X-ray diffraction study).Compound 2 is very light-sensitive in solution, thus giving the derivative (η⁵-C5H5)3Fe2MnSe(CO)5 (3).According to a crystal structure determination, this latter compound once again exhibits a pyramidal Fe2MnSe core but with the iron atoms directly connected with each other via a single bond (266.7(1) pm).