Synthesis of Chlorotitanium(IV) Schiff-Base Complexes and their Application to Styrene Polymerization

✍ Scribed by Il Kim; Yun Sun Ha; Dan Feng Zhang; Chang-Sik Ha; Uk Lee

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 114 KB
• Volume: 25
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200400137

✦ Synopsis

Abstract

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.
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