Reactions of phosphine-boron trihalide adducts with carbonylbis(triethylphosphine)rhodium(I) halides

Add time:09/06/2019    Source:sciencedirect.com

The complex trans-[Rh(CO)X(PEt3)2] (1) (X = Br, I) reacts with PH3BY3 (Y = Cl, Br) in dichloromethane at 183 K to give [Rh(CO)XH(PH2BY3)(PEt3)2] (2). When X = NCS, Y = Br, [Rh(CO)H(PH2BBr3)2(PEt3)2] results. When X = Y = Cl, only known, PH3-containing species result, no -PH2BY3 groups are formed. When X = I, Y = F, there is very little oxidative addition, reaction occurring between 1 and free phosphine. Some simple reactions of 2 were examined. Enrichment with 13C in the carbonyl positions enabled the use of 13C NMR spectroscopy to investigate these reactions and the parameters of eight rhodium complexes observed in this work are given.

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