Synthesis and Structural Characterization of some Ruthenium(II) Alkoxide Complexes

Abstract

The complex [RuCl₂(COD)(OR)₂] (COD = cyclo-octa-1,5-diene and R = CH₃ or C₂H₅) has been prepared by treatment of the polymeric specie [{RuCl₂(COD)}_x]) with appropriate LiOR solution and has been characterized by elemental analysis, IR and ^lH NMR spectroscopic analyses. The reaction of the alkoxide complex with two or more equivalent of phosphine ligands gave the complex [Ru(COD)(OR)₂L₂] (R = CH₃ or C₂H₅; L = o-methoxyphenyldiphenylphosphine and tri(m-tolyl)phosphine) while the subsequent reaction with diphenylphosphine yielded [Ru(OR)₂(Ph₂P)₄] (R = C₂H₅). Spectroscopic and elemental analysis data revealed symmetric alkoxide-bridged diruthenium phosphine complexes.