Kinetic studies of the cleavage of M +[M′M″(CO) 9L] − (M +  Na +, PPN +; M′  Cr, W; M″  Mn, Re; L  CO, PR 3)

Abstract

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) 9L] − (M + = Na +; M′  Cr, W; M″  Mn, Re; L  CO, PR 3) undergoes ligand substitution or metal-metal bond cleavage upon reaction with PR 3 (R  C 6H 5, C 2H 5) 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.