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INTERMEDIATES IN THE CONVERSION OF (R = Me OR Ph) INTO 3-C6H4)(μ3-PR)(CO)9>: CRYSTAL AND MOLECULAR STRUCTURES OF AND 3-C6H4PMe-o)(CO)10>

DOI: 10.1039/DT9870001529

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1529 - 1534 (1987)

Update date:2022-08-02

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Authors:

Deeming, Antony J.Deeming, Antony J.

Kabir, Shariff E.Kabir, Shariff E.

Powell, Nicholas I.Powell, Nicholas I.

Bates, Paul A.Bates, Paul A.

Hursthouse, Michael B.Hursthouse, Michael B.

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Article abstract of DOI:10.1039/DT9870001529

The thermal conversion of (R = or Ph) into 3-C6H4)(μ3-PR)(CO)9> (3) by loss of carbon monoxide, and probably benzene, has been reported.By carrying out the reactions at lower temperatures we have been able to isolate 3-C6H4PMePh)(CO9> (1a) and 3-C6H4PMe)(CO)10> (2a) from the methyldiphenylphosphine compound and corresponding derivatives (1b) and (2b) from the triphenylphosphine derivative.Both (1) and (2) convert thermally to the μ3-C6H4 clusters (3) and are deduced to be intermediates in the formation of (3).The single-crystal X-ray structures of (1a) and (2a) are reported.In (1a), μ3-C6H4PMePh-o is a five-electron donor bonded through P to one Os atom, by a ?-Os-C bond to another, and by an η2 interaction of the C6H4 ring to the third.Compound (2a) contains the μ3 ligand C6H4PMe-0, as a four electron donor, and a bridging CO ligand.In the degradation of PRPh2 into the components C6H4, PR, and C6H6, ortho-metallation is the first step, but probably follows an initial loss of CO.

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