Araujo, Maria Helena, Avent, Anthony G, Hitchcock, Peter B, Nixon, John F and Vargas, Maria D (1998) Hydrometalation of PCBut and Activation of the P−C Bond by a Tetrairidium Carbonyl Cluster:  Solution Characterization of [Ir4Pt(dppe)(CO)n{μ-PC(H)But}(μ-PPh2)] (n = 10 and 9) and Crystal and Molecular Structures of the Phosphinidine Complex [HIr4Pt(dppe)(μ-CO)(CO)7(μ-PCH2But)(μ-PPh2)] and of the Partially Encapsulated Phosphide Compound [Ir4Pt(dppe)(μ-CO)(CO)8(μ5-P)(μ-PPh2)]. Organometallics, 17 (25). 5460 - 5466. ISSN 0276-7333

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Abstract

Reaction of [HIr4(CO)10(μ-PPh2)], 1, with [Pt(dppe)(η2-PCBut)] yields four Ir4Pt clusters [Ir4Pt(dppe)(CO)n{μ-PC(H)But}(μ-PPh2)] (n = 10, 2, and 9, 3), [HIr4Pt(dppe)(μ-CO)(CO)7(μ-PCH2But)(μ-PPh2)], 4, and [Ir4Pt(dppe)(μ-CO)(CO)8(μ5-P)(μ-PPh2)], 5. These compounds contain fragments arising from hydrometalation and cleavage of the P−C triple bond of the phosphaalkyne. The structures of compounds 2 and 3, isolated as a mixture, were proposed on the basis of multinuclear NMR and mass spectrometry. To our knowledge these are the first examples of clusters containing a phosphido fragment {μ-PC(H)But} originating from hydrometalation of the phosphaalkyne. Compounds 4 and 5 were characterized in solution by multinuclear NMR spectroscopy, and their solid-state structures were determined by X-ray analyses. A remarkably low 1JP-Pt coupling constant in the Pt(dppe) fragment of the former square-based pyramidal compound is discussed.

Item Type:	Article
Schools and Departments:	School of Life Sciences > Chemistry
Depositing User:	John Nixon
Date Deposited:	06 Feb 2012 18:33
Last Modified:	14 Sep 2012 14:12
URI:	http://sro.sussex.ac.uk/id/eprint/17131

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