期刊
COORDINATION CHEMISTRY REVIEWS
卷 236, 期 1-2, 页码 15-33出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S0010-8545(02)00158-3
关键词
ketenylidenetriphenylphosphorane; Ph3PCCO; ylides; ketenes; metal-substituted ketenes; eta(1)-ketenyl complexes
Ketenylidenetriphenylphosphorane, Ph3P=C=C=O (1), presents, at a first glance, the characteristics of both ylides and ketenes, but its behavior is that typical of ylides, undergoing electrophilic attacks on the ylidic carbon that transform 1 into a 'true' ketene having PPh3 as one substituent. Here we review the synthesis, the chemical-physical properties as well as the reactivity of these compounds, with a particular emphasis on the interaction with transition metal complexes. With this compound it has always been observed that the ylidic carbon of 1 binds to coordinatively unsaturated metals, which act as electrophiles, forming eta(1)-ketenyl derivatives that can also be viewed as stabilized metal-substituted ketenes. Perspectives for the synthesis of other metal-substituted ketenes and developments on their study are also presented. (C) 2002 Elsevier Science B.V. All rights reserved.
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