Supported metal complexes

These siUca-supported catalysts demonstrate the close connections between catalysis in solutions and catalysis on surfaces, but they are not industrial catalysts. However, siUca is used as a support for chromium complexes, formed either from chromocene or chromium salts, that are industrial catalysts for polymerization of a-olefins (64,65). Supported chromium complex catalysts are used on an enormous scale in the manufacture of linear polyethylene in the Unipol and Phillips processes (see Olefin polymers). The exact stmctures of the surface species are still not known, but it is evident that there is a close analogy linking soluble and supported metal complex catalysts for olefin polymerization. 

R. F. Hartley, Supported Metal Complexes, D. Reidel, Do-rdrecth, 1985. 

Three main methods of synthesis of supported metal complex catalysts can be distinguished from the literature, which we will successively analyze ... 

SOME REACTIONS CATALYZED BY SUPPORTED METAL COMPLEXES... 

Hartley, F. R. Supported Metal Complexes. Reidel Dordrecht, The Netherlands, 1985. 

Supported metal complexes as catalysts (A. Choplin, F. Quignard)... 

F.R. Hartley Supported Metal Complexes. A New Generation of Catalysts. 1985... 

The smaller p -tert-butyl-calix [4] arenes have a rich coordination chemistry as well (65). Of these, however, only the upper-rim modified calixarenes seem to support metal complexes with confined binding sites (66), except in those cases where the lower-rim substituents form an appended cavity. Thus, Matt and coworkers have reported (67) a pocket-shaped calix[4]arene ligand L2 bearing two lower-rim [([Pg.410]

While such a film format is not intended for routine use in e.g. soHd phase synthesis, it has proved useful for spectroscopic mechanistic investigation of polymer-supported metal complex catalysts [49] and we, with our collaborators, are employing such films as a component in nanosecond fluorescence sensing devices [50]. 

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