Fluxional behaviour of phosphine complexes of tri carbon yl-ri5 cyclopentadienylhydridotungsten 1

الملخص EN

Complexes of the general formula [ W ( rj5-C5Hs ) ( CO ) nLH ], n = 2, L=PMe2Ph, PEt2Ph, PMePh2, PMunPh2, PBu"3, P(CH2Ph)3, P(OPh) and n = 1, L = Ph2PCH2CH2PPh2, have been isolated and chaiacterized by IR, NMR (1H, 13C, 3lp) and mass spectroscopy.

Interconversion of ds and trans isomers has been studied by variable temperature JH NMR measurements and values of AH- and AG~ associated with isomerisation have been calculated.

The results are compared with those from analogous molybdenum complexes made previously by others.