Nuclear magnetic resonance studies on metal complexes. Part III. Dimethylphenylphosphine complexes of ruthenium(II)

Abstract
New complexes are described of types [RuX2(CO)(PMe2Ph)3](X = Cl, Br, I, or SCN), [RuXCl(CO)(PMe2Ph)3](X = Br, or I, [RuHX(CO)(PMe2Ph)3](X = Cl, Br, or I), and [RuX2(CO)2(PMe2Ph)2](X = Cl, Br, or I). Results for the methyl resonance spectra are given, the spectra being very useful in determining stereochemistry. Empirical shielding constants are calculated for the effects on the τ-values of the methyl resonances on replacing Cl by Br or I. Resonance results for the ruthenium hydrides are reported as are infrared and dipole moment measurements. The trans-effects of carbon monoxide, tertiary phosphine, and chloride ligands in ruthenium(II) complexes are discussed.

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