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Syndiospecific Polymerization Catalysts for Styrene Based on Rare Earth Metal Half‐Sandwich Complexes
Author(s) -
Hitzbleck Julia,
Beckerle Klaus,
Okuda Jun,
Halbach Tobias,
Mülhaupt Rolf
Publication year - 2006
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200690060
Subject(s) - cyclopentadienyl complex , scandium , isostructural , styrene , yttrium , alkyl , polymerization , chemistry , polymer chemistry , lutetium , catalysis , metal , lanthanide , inorganic chemistry , materials science , copolymer , organic chemistry , crystal structure , polymer , ion , oxide
Abstract In the presence of an trialkyl aluminum cocatalyst the activation of scandium, yttrium and lutetium mono(cyclopentadienyl) complexes with various substituted cyclopentadienyl ligands by [Ph 3 C][B(C 6 F 5 ) 4 ] results in highly efficient catalysts for the syndiospecific polymerization of styrene. As active species half‐sandwich alkyl cations is assumed that is isostructural with the mono(cyclopentadienyl) titanium alkyl cation originally proposed by Zambelli.