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Synthesis of Chlorotitanium( IV ) Schiff‐Base Complexes and their Application to Styrene Polymerization
Author(s) -
Kim Il,
Ha Yun Sun,
Zhang Dan Feng,
Ha ChangSik,
Lee Uk
Publication year - 2004
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400137
Subject(s) - styrene , schiff base , polymer chemistry , chemistry , polymerization , ligand (biochemistry) , yield (engineering) , catalysis , aryl , metal salen complexes , copolymer , materials science , organic chemistry , polymer , alkyl , biochemistry , receptor , metallurgy
Summary: A [TiCl 2 (salen)] complex and its derivatives with the formula [TiCl 2 (L)] [L = salen( t Bu), salen(di‐Me), salen(di‐ t Bu), salen(Me)] were synthesized in high yield by reacting the Schiff‐base ligands with TiCl 4 . [TiCl 2 {salen( t Bu)}] and [TiCl 2 {salen(di‐ t Bu)}] have been characterized by single‐crystal X‐ray diffraction. Styrene polymerizations carried out with [TiCl 2 (salen)] and its derivatives co‐catalyzed by MAO yielded syndiotactic polystyrenes. The catalytic activity and syndiospecificity were dependent on the bulkiness of the ortho substituents in the aryl ring of ligand.