Highly active and stereospecific polymerization of 1,3-butadiene catalyzed by bis{[2-(4,5-diphenylimidazolyl)phenylimino]phenolate}cobalt(II) complexes
作者： Shuai Lv , Suyun Jie , Bo-Geng Li
DOI: 10.1016/J.JORGANCHEM.2015.09.026
关键词: Molar mass distribution 、 1,3-Butadiene 、 Catalysis 、 Chemistry 、 Cobalt 、 Ligand 、 Polymer 、 NMR spectra database 、 Polymerization 、 Polymer chemistry
摘要: Abstract A series of bis{[2-(4,5-diphenylimidazolyl)phenylimino]phenolate}cobalt(II) complexes (C1–C4) has been synthesized and characterized. Single-crystal X-ray analysis demonstrated that the cobalt center was coordinated by two [NNO–] ligands adopted a slightly distorted octahedronal geometry. The type cocatalyst had remarkable influence on catalytic properties ethylaluminum sesquichloride (EASC) proved to be more efficient for polymerization 1,3-butadiene produce higher conversion butadiene cis-1,4 content polybutadienes. On activation with EASC, all displayed high activity 1,3-butadiene. microstructure determined FT-IR NMR spectra contents in resulting polymers were obtained. butadiene, microstructure, molecular weight distribution polybutadienes influenced reaction parameters ligand structure.
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