Dehydrocoupling Reactions of Dimethylamine-Borane by Pt(II) Complexes: A New Mechanism Involving Deprotonation of Boronium Cations

Coordinatively unsaturated Pt(II) complex [Pt(I t Bu′)(I t Bu)]+ stabilized by N-heterocyclic carbene (NHC) ligands dehydrogenates N,N-dimethylamineborane through a mechanism that involves hydride abstraction, assisted by an amine, to yield a platinum-hydride complex [PtH(I t Bu′)(I t Bu)] with conc...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the American Chemical Society 2013-07, Vol.135 (30), p.10910-10913
Main Authors: Roselló-Merino, Marta, López-Serrano, Joaquín, Conejero, Salvador
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Coordinatively unsaturated Pt(II) complex [Pt(I t Bu′)(I t Bu)]+ stabilized by N-heterocyclic carbene (NHC) ligands dehydrogenates N,N-dimethylamineborane through a mechanism that involves hydride abstraction, assisted by an amine, to yield a platinum-hydride complex [PtH(I t Bu′)(I t Bu)] with concomitant formation of the boronium cation [(NHMe2)2BH2]+. This latter species is very likely in equilibrium with the THF stabilized borenium cation [(NHMe2)(THF)BH2]+, bearing an acidic NH group that is able to protonate the platinum hydride [PtH(I t Bu′)(I t Bu)] releasing H2, the amino borane H2B-NMe2 and regenerating the catalytic [Pt]+ species.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja404655v