77357-83-6Relevant academic research and scientific papers
Novel route to iron-carbene derivatives via addition of alkynes to carbon disulfide-iron complexes. Rearrangement of (1,3-dithiol-2-ylidene)iron complexes into heterometallacycles
Le Bozec, Hubert,Gorgues, Alain,Dixneuf, Pierre H.
, p. 2486 - 2489 (2008/10/08)
Addition of a variety of alkynes, containing a formyl, acyl, or carboxylate group, to a benzene solution of Fe(η2-CS2)-(CO)2[P(OMe)3] 2 produces carbene-iron complexes (A), the (1,3-dithiol-2-ylidene)iron derivatives 2 resulting from the bonding of both sulfur atoms to the alkyne carbons. The reaction of dimethyl acetylenedicarboxylate with Fe(η2-CS2)(CO)2L2 affords the carbene complex A which is stable when L is P(OMe)3 or PPh3 but isomerizes into a heterometallacycle (B) for L = PMe3 and gives the A ? B equilibrium when L = PMe2Ph. The cycloaddition of the alkyne to the CS2 ligand is shown to be reversible. The A ? B equilibrium constant and the rate of the isomerization of A increase with the electron-donating capability of the ligand L. 1,3-Dipolar cycloaddition of the alkyne to the FeCS2 moiety may account for these reactions.
