Unsupported boron–carbon σ-coordination to platinum as an isolable snapshot of σ-bond activation

Braunschweig, Holger, Brenner, Peter, Dewhurst, Rian D, Krummenacher, Ivo, Pfaffinger, Bernd and Vargas, Alfredo (2012) Unsupported boron–carbon σ-coordination to platinum as an isolable snapshot of σ-bond activation. Nature Communications, 3 (872). ISSN 2041-1723

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Abstract

σ-Complexes of transition metals—key intermediates in metal-mediated bond activation and homogeneous catalysis—have traditionally been isolable only when chelating or when one of the participating atoms is hydrogen. Here, by treating the Lewis-basic transition metal complex [Pt(PEt3)4] with an electron-poor borirene, we isolate a complex with an unsupported borirene ligand bound, not through the unsaturated C=C bond, but exclusively via a B–C single bond. Using NMR spectroscopy, X-ray crystallography and density functional theory calculations, we show, herein, that coordination of the borirene ligand is based on electron donation from the B–C σ bond to the metal, aided by a strong Pt-to-B dative interaction. The complex is the first isolable non-agostic σ-complex featuring two p-block elements and has broad implications as a model for the metal-mediated activation of strong p-block-p-block σ-bonds.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science
Depositing User: Deeptima Massey
Date Deposited: 12 Sep 2013 09:52
Last Modified: 12 Sep 2013 09:52
URI: http://sro.sussex.ac.uk/id/eprint/46160
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