Supported organometallic

Recently some information became available on a new type of highly active one-component ethylene polymerization catalyst. This catalyst is prepared by supporting organometallic compounds of transition metals containing different types of organic ligands [e.g. benzyl compounds of titanium and zirconium 9a, 132), 7r-allyl compounds of various transition metals 8, 9a, 133), 7r-arene 134, 185) and 71-cyclopentadienyl 9, 136) complexes of chromium]. 

Catalytic Activity of Supported Organometallic Compounds in Ethylene... 

E. Lindner, A. Jaeger, F. Auer, W. Wielandt and P. Wegner, Supported organometallic complexes. Part XIII. Catalytic studies on sol-gel processed (ether phosphine)ruthenium(II) complexes with different spacer lengths and different polysiloxane matrices, J. Mol. Catal. A Chem., 1998, 129, 91. 

Nagata, T., Pohl, M., Weiner, H., and Finke, R.G., Polyoxoanion-supported organometallic complexes carbonyls of Rhenium(I), Iridium(I), and Rhodium(I) that are soluble analogs of solid-oxide-supported M(CO) + and that exhibit novel M(CO)n+ mobility, Inorg. Chem., 36, 1366, 1997. 

Mesoporous Silica Supported Organometallic Catalysts by Grafting... 

Molecular Insight for Silica-Supported Organometallic Chemistry through Transition Metal Silsesquioxanes... 

Park KH, Jang K, Son SU, Sweigart DA. Self-supported organometallic rhodium quinonoid nanocatalysts for stereoselective polymerization of phenylacetylene. J Am Chem Soc 2006 128 8740-8741. 

This reaction was one of the first examples of catalysis by a supported organometallic compound. In 1964 it was observed that Mo (CO) 6/ A1203, after activation by heating in vacuo at 120°C, catalyzed the conversion of propylene into ethylene and 2-butene (82). The nature of the active site in this catalyst system is still not fully defined (83). Since the initial discovery many heterogeneous and homogeneous catalyst systems have been reported (84, 85), the latter being more amenable to kinetic and mechanistic studies. 

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