Synthesis and characterization of novel molybdenum(III) confacial bioctahedral complexes: X-ray crystal structures of [Ph4P][(Me2S)-Cl2Mo(µ-Cl)3MoCl2(SMe2)] and (Me2S)Cl2Mo(µ-Me2S)(µ-Cl)2MoCl2-(SMe2)

Abstract

The reaction of Et₃SiH with MoCl₄(Me₂S)₂ produces a series of isomeric molybdenum(III) complexes with the general formula Mo₂Cl₆(Me₂S)₃; X-Ray crystallographic results and/or¹H n.m.r. and analytical data establish the existence of the antiferromagnetic species, (Me₂S)Cl₂Mo(µ-Cl)₃MoCl(SMe₂)₂(1)[meso-and (+), (–)-forms], its chloro-anionic derivative, [Ph₄P][(Me₂S)Cl₂Mo(µ-Cl)₃MoCl₂](2), and the diamagnetic complex, (Me₂S)Cl₂Mo(µ-Me₂S)(µ-Cl)₂MoCl₂)(SMe₂)(3).