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Early-Late Heterobimetallic Complexes of Group 4 Metals as Potential Catalysts

Early-Late Heterobimetallic Complexes of Group 4 Metals as Potential Catalysts [Pg.85]

There are a considerable number of reports of catalytic activity of early-late heterobimetallic complexes, which is believed to differ substantially from that of the mononuclear and/or homometal-lic reference systems. The hydrosilylation of ketones and the Kumada couplings catalyzed by the Zr-Co complex 20 have already been mentioned earlier. Previously, Fandos etaL reported the Ti/Rh heterometallic complex [(CjMejjTifp-OjjIRhfCODjjj], which they regarded as a molecular model for SMSI in TiOj-supported Fischer-Tropsch catalysts. In the presence of this material, CO was indeed reduced at 250 °C and 20 bar (H2 CO 3 1) to give, inter alia, methane and short-chain alcohols. However, neither the catalytically active species nor the importance of a possible bonding interaction between the metal centers has been established [39]. [Pg.86]

The area of early-late transition metal complex catalysis has been reviewed recently [40]. While there is an ever-growing number of studies in this field, a conclusive and unambiguous example for cooperativity of the two M-M -bonded metal centers is still lacking. [Pg.87]

Metal-metal bonded early-late heterobimetal-lic complexes and the issue of metal-metal bonding have been discussed specifically in  [Pg.88]




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Catalyst potential

Catalysts heterobimetallic

Complex potential

Complexes of Group

Early-late heterobimetallic complexes

Group 2 heterobimetallics

Group 2 heterobimetallics complexes

Group 5 metal complex

Group 8 catalysts

Group heterobimetallic complexes

Heterobimetallic

Heterobimetallic complexes

Heterobimetallics

Heterobimetallics Metals

Metal catalysts, Group

Metal potential

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