摘要：

Participation of several 14-electron complexes as intermediates in the [Rh(PH3)3Cl]-catalyzed addition of BH3 to alkenes is suggested by results of ab initio pseudopotential computations, which also indicate a preference for migration of a hydrogen atom rather than the BH2 group to the C C bond in the key step. The calculations also provide a rationale for the diastereoselectivity of the reaction. The structure calculated for one of the intermediates is shown on the right.

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