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Stepwise Oxidation of Benzylamine Coordinated to the [Tp‘W(CO)(PhC 2 Me)] + Moiety

1996; American Chemical Society; Volume: 118; Issue: 29 Linguagem: Inglês

10.1021/ja953944a

1943-2984

T. Brent Gunnoe, Peter S. White, Joseph L. Templeton,

Synthetic Organic Chemistry Methods

Coordination of benzylamine to the [Tp'W(CO)(PhC2Me)]+ moiety activates the amine for stepwise oxidation by sequential hydride/proton removal steps. Each metal complex along the stepwise reaction path (amine, amido, imine, azavinylidene, and nitrile) has been isolated and characterized. The structure of the imine complex [Tp'W(CO)(PhC2Me)(NHCHPh)][BF4] (4) has been confirmed by an X-ray diffraction study. Complex 4 crystallizes in the space group P21/c (Z = 4, a = 13.790(3) Å, b = 13.225(3) Å, c = 19.150(4) Å, β = 108.769(1)°, R = 3.5%, Rw = 4.4%), and key geometric features include a W−N dative bond length of 2.135(6) Å to the imine nitrogen and a W−N−C angle of 129.7(5)°.