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Synthesis, Structure and Reactivity in Styrene Polymerization by Heterocyclic Alkoxy‐ and Thiolatotitanium( IV ) Complexes
Author(s) -
Aragón Pedro J.,
CarrilloHermosilla Fernando,
Villaseñor Elena,
Otero Antonio,
Antiñolo Antonio,
Rodríguez Ana M.
Publication year - 2006
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200500826
Subject(s) - chemistry , methylaluminoxane , alkoxy group , styrene , reactivity (psychology) , polymerization , ligand (biochemistry) , chelation , metallocene , medicinal chemistry , polymer chemistry , catalysis , crystal structure , stereochemistry , single crystal , crystallography , organic chemistry , copolymer , polymer , alkyl , medicine , biochemistry , alternative medicine , receptor , pathology
The reaction of [Ti(O i Pr) 4 ] or [TiCl 4 (THF) 2 ] with two equivalents of pyridyl alcohols or pyridyl or pyrimidinyl thiols has proven to be a good preparative method to obtain a variety of non‐metallocene diisopropoxo‐ or dichlorotitanium( IV ) complexes. The complexes [Ti(X) 2 {2‐(OCH 2 )‐6‐R‐(C 5 H 3 N)} 2 ] were found to be dynamic at room temperature, with the heterocyclic alkoxy ligand dissociating and recoordinating in a κ 2 ‐N,O chelate fashion, as revealed by a single‐crystal X‐ray analysis of [Ti(O i Pr) 2 {2‐(OCH 2 )(C 5 H 4 N)} 2 ] ( 1 ). The dynamic behavior of some of the resulting thiolato complexes was also studied and the single‐crystal X‐ray analysis of [Ti(O i Pr) 2 {2‐S‐4,6‐Me 2 ‐(C 4 HN 2 )} 2 ] ( 5 ) revealed a κ 2 ‐N,S system for these complexes. These complexes show catalytic activity in the polymerization of styrene upon activation with methylaluminoxane. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)