Premium
A combined NMR and electron spin resonance investigation of the (C 5 (CH 3 ) 5 )Ti(CH 2 C 6 H 5 ) 3 /B(C 6 F 5 ) 3 catalytic system active in the syndiospecific styrene polymerization
Author(s) -
Grassi Alfonso,
Pellecchia Claudio,
Oliva Leone,
Laschi Franco
Publication year - 1995
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1995.021960411
Subject(s) - electron paramagnetic resonance , polymerization , chemistry , chlorobenzene , nuclear magnetic resonance spectroscopy , styrene , resonance (particle physics) , spectroscopy , crystallography , nuclear magnetic resonance , copolymer , stereochemistry , polymer , catalysis , organic chemistry , atomic physics , physics , quantum mechanics
The reaction of (C 5 (CH 3 ) 5 )Ti(CH 2 C 6 H 5 ) 3 with B(C 6 F 5 ) 3 in chlorobenzene at 25°C produces a mixture of [(C 5 (CH 3 ) 5 )Ti(CH 2 C 6 H 5 ) 2 ] + [B(CH 2 C 6 H 5 )(C 6 F 5 ) 3 ] − ( 1 ) and Ti(III) complexes which have been characterized by NMR and electron spin resonance (ESR) spectroscopy, respectively. Spectroscopic data combined with polymerisation activity measurements suggest that a Ti(III) complex is the active species in the styrene syndiospecific polymerisation.