Kinetic studies of the cleavage of M+[M′M″(CO)9L]- (M+ Na+, PPN+; M′ Cr, W; M″ Mn, Re; L CO, PR3)

초록

Heterobimetallic complexes have a donor-acceptor metal-metal bond in which two electrons from the electron rich metal moiety are donated to the other electron-deficient metal moiety. The heterobimetallic species of interest, M+[M′M″(CO)<inf>9</inf>L]- (M+ = Na+; M′ Cr, W; M″ Mn, Re; L CO, PR<inf>3</inf>) undergoes ligand substitution or metal-metal bond cleavage upon reaction with PR<inf>3</inf> (R C<inf>6</inf>H<inf>5</inf>, C<inf>2</inf>H<inf>5</inf>) or CO. Unprecedented reactions by the counter ion were observed. Factors affecting these dimeric disruptions will be discussed on the basis of the kinetic studies. © 1991.