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

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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.