The chemistry of the carbon-transition metal double and triple bond: annual survey covering the year 1997

This survey is intended to be a comprehensive coverage of articles which re port on the synthesis, reactivity, or properties of compounds which feature a multiple bond between carbon and a transition metal. Reactions which emp loy metal carbene complexes as transient intermediates generated through we ll-established routes are not covered unless there is some effort to charac terize the carbene complex intermediate. Only compounds which feature a mul tiple bond between one carbon atom and one transition metal are discussed i n this survey, thus bridging carbene and carbyne complexes are not covered unless there is a multiple bond to one transition metal. The complexes of s table carbenes with transition metals have not been included; since the rr- donation component of these complexes is minimal, there is no formal carbon -metal multiple bond (J.C. Green, R.G.; Scurr, P.R. Arnold, F.G.N., Cloke, J. Chem. Sec. Chem. Commun. (1997) 1963; A.A. Danopoulos, D.M. Hankin, G. W ilkinson, S.M. Cafferkey, T.K.N. Sweet, M.B., Hursthouse, Polyhedron 16(199 7) 3879). This survey has been divided into two sections, metal carbene (or alkylidene) complexes and metal carbyne (or alkylidyne) complexes; the car bene complex section represents the vast majority of this article. The meta l carbene section has been organized according to metal, starting from the left side of the Periodic Table. A special section focusing on alkene metat hesis has been included prior to the discussion of carbene complexes of ind ividual metals. The metal carbyne section has been organized according to r eaction type. (C) 1999 Elsevier Science S.A. All rights reserved.