Jw. Herndon, The chemistry of the carbon-transition metal double and triple bond: annual survey covering the year 1998, COORD CH RE, 209, 2000, pp. 387-451
This survey is intended to be a comprehensive summary of articles, which re
port on the synthesis, reactivity, or properties of compounds that feature
a multiple bond between carbon and a transition metal. Reactions that emplo
y metal carbene complexes as transient intermediates generated through well
-established routes [this subject was reviewed in 1998: M.P. Doyle, M.N. Pr
otopopova, Tetrahedron 54 (1998) 7919] are not covered unless there is some
effort to characterize the carbene complex intermediate. Although a determ
ined effort has been made to include patents, in general only patents that
focus on carbene complexes and not polymer products will be included. Only
compounds which feature a multiple bond between one carbon atom and one tra
nsition metal are discussed in this survey, thus bridging carbene and carby
ne complexes are not covered unless there is a multiple bond to at least on
e transition metal. The complexes of stable carbenes with transition metals
have not been included; since the pi -donation component of these complexe
s is minimal, there is no formal carbon-metal multiple bond [see J.C. Green
, R.G. Scurr, P.R. Arnold, F.G.N. Cloke, J. Chem. Sec. Chem. Commun. (1997)
1963, and A.A. Danopoulos, D.M. Hankin, G. Wilkinson, S.M. Cafferkey, T.K.
N. Sweet, M.B. Hursthouse, Polyhedron 16 (1997) 3879]. This survey has been
divided into two sections, metal carbene (or alkylidene) complexes and met
al carbyne (or alkylidyne) complexes; the carbene complex section represent
s the vast majority of this article. The metal carbene section has been org
anized according to metal, starting from the left side of the periodic tabl
e. A special section focusing on alkene metathesis has been included prior
to the discussion of carbene complexes of individual metals. The metal carb
yne section has been organized according to reaction type. (C) 2000 Elsevie
r Science B.V. All rights reserved.