Trialkylborane-Assisted CO(2) Reduction by Late Transition Metal Hydrides

Overview

Journal Organometallics

Publisher American Chemical Society

Date 2011 Sep 13

PMID 21909178

Citations 9

Authors

Alexander J M Miller

Jay A Labinger

John E Bercaw

Affiliations

Soon will be listed here.

Abstract

Trialkylborane additives promote reduction of CO(2) to formate by bis(diphosphine) Ni(II) and Rh(III) hydride complexes. The late transition metal hydrides, which can be formed from dihydrogen, transfer hydride to CO(2) to give a formate-borane adduct. The borane must be of appropriate Lewis acidity: weaker acids do not show significant hydride transfer enhancement, while stronger acids abstract hydride without CO(2) reduction. The mechanism likely involves a pre-equilibrium hydride transfer followed by formation of a stabilizing formate-borane adduct.

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