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Crystal Structures of , and (M = Mo or W): A Comparative Study of Structure and Bonding in Complexes (E = P, As or Sb; M = Cr, Mo or W)

DOI: 10.1039/DT9940002827

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 2827 - 2834 (1994)

Update date:2022-08-02

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Authors:

Aroney, Manuel J.Aroney, Manuel J.

Buys, Irmi E.Buys, Irmi E.

Davies, Murray S.Davies, Murray S.

Hambley, Trevor W.Hambley, Trevor W.

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Article abstract of DOI:10.1039/DT9940002827

Crystal structures have been determined for , and (M = Mo or W) as part of a systematic study of a series of nine complexes (M = Cr, Mo or W; E = P, As or Sb).Trends in bond lengths and angles are rationalised in terms of streric and electronic interactions between the bonded M(CO)5 and EPh3 fragments.Comparison is made between the solid-state geometry of the free and co-ordinated EPh3.Torsion angles defining the disposition of the EPh3 groups in relation to M(CO)5 show little variation within the series.For all nine complexes the EPh3 groups have propeller geometry with small deviations from symmetric C3 structures.The studies were extended to include other related complexes.Trends in the strutural parameters of 29 such compounds are related to the steric behaviour and ?-acceptor capacity of the ligands L.It is shown that M-P bond dimensions are not adequately explained by hybridisation changes of the phosphorus atom in the ligand L.

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