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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)]
journal contribution
posted on 2023-06-07, 20:32 authored by Maria Helena Araujo, Anthony G Avent, Peter B Hitchcock, John F Nixon, Maria D VargasReaction of [HIr4(CO)10(µ-PPh2)], 1, with [Pt(dppe)(?2-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.
History
Publication status
- Published
Journal
OrganometallicsISSN
0276-7333Publisher
American Chemical SocietyExternal DOI
Issue
25Volume
17Page range
5460 - 5466ISBN
0276-7333Department affiliated with
- Chemistry Publications
Full text available
- No
Peer reviewed?
- Yes