Journal of Organometallic Chemistry p. 83 - 96 (1984)
Update date:2022-08-05
Topics:
Howell, James A. S.
Kola, John C.
Dixon, Denis T.
Burkinshaw, Philip M.
Thomas, Marion J.
Kinetic data for the exchange of 1,3-cyclohexadiene with (η4-benzylideneacetone)Fe(CO)2L complexes (L = CO, PPh3-xMex (x = 0-2) or P(OPh)3) to give (η4-1,3-cyclohexadiene)Fe(CO)2L derivatives indicate a mechanism involving stepwise competing D and Id opening of the ketonic M-CO ?-bond.Rates increase in the order CO>>PPh3<*>P(OPh)3>PPh2Me>>PPhMe2, and both steric and electronic factors appear to be important. (η4-1,3-cyclohexadiene)Fe(CO)2L complexes of potential use in enantioselective synthesis (L = (+)-Ph2P(menthyl) or (+)-Ph2PCH2CH(Me)Et) may be preparedvia their (η4-benzylideneacetone)Fe(CO)2L complexes.
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