252331-76-3Relevant academic research and scientific papers
Silyl migration of Me3SiCCPh coordinated to [RuH(CO)(P(t)Bu2Me)2]BAr'4 can be reversed: Synthesis and structure of [Ru(CH=C(SiMe3)(Ph))(CO)(P(t)Bu2Me)2]BAr'4
Huang, Dejian,Folting, Kirsten,Caulton, Kenneth G.
, p. 10318 - 10322 (1999)
Reaction of 14-electron RuH(CO)L2+ (L = P(t)Bu2Me, anion = B[C6H3(CF3)2]4-) with Me3≡SiCCPh gives the silyl-migrated product Ru[CH=C(SiMe3)Ph](CO)L2+, in which the ortho H on phenyl syn to Ru is agostic to the metal, to give a square-pyramidal coordination geometry augmented by an agostic interaction with a (t)Bu methyl group. These interactions, from X-ray diffraction, persist in solution. Reaction at lower temperature reveals (NMR studies) one detectable species which, however, is unlikely to be an intermediate. Under 1 atm of CO, this cation adds three CO's to give Ru(CO)2[CO - CH=C(SiMe3)Ph]L2+, which is shown (13CO labeling) to add an additional CO. In the absence of excess CO, this acyl complex forms RuH(CO)3L2+ with release of Me3SiC≡CPh; Me3Si migration is thus reversed.
