Alkenylvinylidene and allenylidene complexes: evidence for the formation of a metal–trienylidene intermediate
作者:Michael I. Bruce、Peter Hinterding、Paul J. Low、Brian W. Skelton、Allan H. White
DOI:10.1039/cc9960001009
日期:——
Reactions of [Ru(thf)(PPh(3))(2)(eta-C5H5)][PF6] with buta-1,4-diyne in the presence of nucleophiles give alkenylvinylidene or allenylidene complexes; the results are rationalised in terms of the formation of the intermediate trienylidene cation [Ru(C=C=C=CH2)(PPh(3))(2)(eta-C5H5)](+) which undergoes nucleophilic addition at C-gamma; the X-ray structure of the heteroallenylidene [RuC=C=CMe(NPh(2))}(PPh(3))(2)(eta-C5H5)][PF6] 2 is determined.