Some carbonyl complexes of rhenium(I) and rhenium(III) containing dimethylphenylphosphines as ligands

Abstract

Treatment of mer-[ReCl₃(PMe₂Ph)₃] with carbon monoxide in boiling 2-methoxyethanol gives two isomers [ReCl(CO)₃(PMe₂Ph)₂]; these with chlorine give a seven-co-ordinate complex [ReCl₃(CO)₂(PMe₂Ph)₂]. mer-[ReCl₃(PMe₂Ph)₃] reacts with carbon monoxide in ethanol to give a seven-co-ordinate complex [ReCl₃(CO)(PMe₂Ph)₃]. Treatment of mer-[ReCl₃(PMe₂Ph)₃] with sodium amalgam and carbon monoxide gives [ReCl(CO)₂(PMe₂Ph)₃], which reacts with chlorine to give [ReCl₃(CO)(PMe₂Ph)₃]. mer-[ReCl₃(PMe₂Ph)₃] reacts with boiling 2-diethylaminoethanol to give [ReCl(CO)(PMe₂Ph)₄]. Other reactions are described. The stereochemistry of most of these complexes was determined from their i.r. absorptions in the carbonyl region and from their ¹H(methyl) n.m.r. patterns. An improved preparation of mer-[ReCl₃(PMe₂Ph)₃] from potassium per-rhenate is described.