Journal of Organometallic Chemistry p. 87 - 92 (1980)
Update date:2022-08-05
Topics:
Kawada, Y.
Jones, W. M.
2,3-Diphenylcyclopropenylidene(pentacarbonyl)tungsten and 2,3-di-t-butylcyclopropenylidene(pentacarbonyl)tungsten have been prepared by the method of Oefele for comparison with cycloheptatrienylidene, diphenylcarbene and phenylmethoxycarbene complexes of pentacarbonyltungsten.Both the cycloheptatrienylidene and cyclopropenylidene complexes are poorer ?-acceptors than the other carbene complexes.Furthermore there is some evidence that cyclopropenylidene is a poorer acceptor than cycloheptatrienylidene although this is not conclusive.Both of the cyclopropenylidene complexes show greater thermal stability and lower chemical reactivity than the cycloheptatrienylidene complex.
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