作者：Li Liu a,b, Xu Zhang a,b, Heng Liu b, Xuequan Zhang b, Guangping Sun a,?, Hexin Zhang b,?
关键字：Cobalt Catalyst 1,3-Butadiene Polybutadiene Polymerization mechanism
论文来源：期刊
具体来源：Inorganica Chimica Acta 414 (2014) 8–14
发表时间：2014年

A series of novel cationic cobalt(II) compounds accompanied by various counter ions ([BF4], [PF6], [SbF6]) and N-bearing ligands (1,10-phenanthroline, bipyridine, benzimidazole, and imidazole) were synthesized. Neutral compounds, CoCl2-nLigands, were prepared as reference compounds. All the compounds were characterized using IR spectral analysis and elemental analysis and some of the compounds were further characterized by single-crystal X-ray diffraction analysis. The synthesized compounds were evaluated as precursors for butadiene polymerization in conjunction with ethylaluminum sesquichloride as a cocatalyst, and the polymerization mechanism was proposed to involve anionic coordination polymerization. The active centers of the catalysts were cationic in nature, and the catalytic activities were affected by the electronegativity of the counter ion.