Adducts of molybdenum(V) trichloride sulphide

Abstract

The compound MoCl₃S reacts with methyl cyanide to give MoCl₃S,MeCN and MoCl₃S,2MeCN, which have been characterised as containing six-co-ordinate molybdenum with bridging Mo–S–Mo and terminal MoS bonds respectively. The complex MoCl₃S,2MeCN reacts with other ligands; 1,4-dioxan and 1,2-bis(methoxy)-ethane give adducts MoCl₃S,2diox and MoCl₃S,bme, while pyridine gives the salt [Hpy][MoCl₄S,py] and 1,10-phenanthroline reduces molybdenum to the quadrivalent state in forming MoCl₂S,phen. Direct reaction of MoCl₃S with py gives MoCl₃S,3py (one py being in the lattice). The salts WCl₃S and MoCl₃S did not react with any of the ligands tried even after prolonged reaction periods.