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DOI: 10.1039/A708041G (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1998, 917-922

A pyridine dialkoxide titanium dichloride complex. Synthesis and molecular structure of 2,6-bis(2,2-diphenyl-2-trimethylsilyloxy- ethyl)pyridine

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Helmut Mack and Moris S. Eisen

Abstract

Reaction of 2,6-dimethylpyridine with 2 equivalents of LiBun followed by addition of 2 equivalents of benzophenone and the consecutive reaction with 2 equivalents of SiMe3Cl afforded the doubly functionalised 2,6-bis(2,2-diphenyl-2-trimethylsilyloxyethyl)pyridine L. The structure of L has been determined by an X-ray diffraction study. Reaction of either a doubly lithiated intermediate or the corresponding silylated ligand L with TiCl4 afforded a pyridine dialkoxide titanium dichloride complex. A cationic α-olefin polymerization catalyst was generated from this complex with an excess of methylaluminoxane (MeAlO)n. A comparison of the catalytic activity with those of similar bis(alkoxide) complexes is presented.

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