Transition metal cooperative Lewis pairs using platinum(0) piphosphine Mmonocarbonyl complexes as Lewis bases

Mistry, Krishna, Pringle, Paul G., Sparkes, Hazel A. and Wass, Duncan F. ORCID: https://orcid.org/0000-0002-0356-7067 2020. Transition metal cooperative Lewis pairs using platinum(0) piphosphine Mmonocarbonyl complexes as Lewis bases. Organometallics 39 (3) , pp. 468-477. 10.1021/acs.organomet.9b00568

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Abstract

The platinum(0)-diphosphine complex [Pt(CO)(L1)] (3, where L1 = 1,2-C6H4(CH2PtBu2)2) and its diphosphinite analogue [Pt(CO)(L2)] (11, where L2 = 1,2-C6H4(OPtBu2)2) act as Lewis bases in conjunction with the main group Lewis acid B(C6F5)3 to form frustrated or cooperative Lewis pairs. These systems activate dihydrogen, ethene/carbon monoxide, and phenylacetylene, leading to products that depend on the exact ligand used. These subtle changes to ligand structure influence reactivity, most notably in hydrogen activation where a variety of dinuclear species of the type [(diphos)Pt(μ-H)3Pt(diphos)]+ or [(diphos)Pt(μ-H)(μ-CO)Pt(diphos)]+ are observed. Activation of ethene with the Lewis pair leads to a previously reported coupling product and the mechanism is probed. The basicity of [Pt(CO)(L)] is demonstrated by deprotonation of phenylacetylene. Preliminary studies with an analogous palladium complex [Pd(CO)(L1)] 33 suggests related chemistry may be exploited for this metal. These results provide further examples of cooperative Lewis pair behavior in which one of the components is based on a transition metal complex.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Publisher:	American Chemical Society
ISSN:	0276-7333
Funders:	EPSRC
Date of First Compliant Deposit:	13 February 2020
Date of Acceptance:	21 January 2020
Last Modified:	01 Dec 2024 11:45
URI:	https://orca.cardiff.ac.uk/id/eprint/129642

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