Ma. Esteruelas et al., Regioselective addition of PRPh2 to the C-alpha atom of the diphenylallenylidene ligand of [Ru(eta(5)-C5H5) (C=C=CPh2)(CO)(PPR3i)]BF4, ORGANOMETAL, 17(24), 1998, pp. 5434-5436
The allenylidene ligand of [Ru(eta(5)-C5H5){C = C=CPh2}(CO)(PPr3i)]BF4 adds
PHPh2, PMePh2, and PPh3 selectively at the C-alpha atom, whereas OH- and [
OMe](-) are added at the C-gamma atom.