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# hmmm.
is it any help to mention vitamin b12?

that has a cobalt-carbon bond, that can break to form a carbon radical

www.chm.bris.ac.uk/motm/vitaminb12/mech.htm

which can attack a carbon atom.
(, Mon 21 May 2007, 21:17, archived)
# I have used that already
cheers, I am still at a lost to carbon carbon bond formation, but I think that alpha beta carbonyls are the answer
(, Mon 21 May 2007, 21:26, archived)
# probably are.
resonance compounds, too, probably.

(I just had to look up alpha/beta carbonyls - not my area :)
(, Mon 21 May 2007, 21:33, archived)
# not mine
it is awful stuff to put in a timed essay
(, Mon 21 May 2007, 21:42, archived)