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DOI: 10.1039/A705821G (Paper) Reference Section for: Chem. Commun., 1997, 2349-2350

Phosphinomethanide versus phosphinoenolate: thermodynamical preference for a three- instead of a five-membered chelate ring

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Gerhard Henig and Helmut Werner

Abstract

The phosphinoenolate complex 4, which is prepared stepwise from [(mes)RuCl2]2 1 via the neutral and cationic compounds 2 and 3 as isolated intermediates, rearranges slowly in benzene to the thermodynamically more stable phosphinomethanide isomer 5; the presence of a three-membered RuCP ring in the latter is confirmed by X-ray crystallography.

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