Synthesis of bis(N-arylcarboximidoylchloride)pyridine cobalt(ii) complexes and their catalytic behavior for 1,3-butadiene polymerization
作者:Heng Liu、Xiangyu Jia、Feng Wang、Quanquan Dai、Baolin Wang、Jifu Bi、Chunyu Zhang、Liping Zhao、Chenxi Bai、Yanming Hu、Xuequan Zhang
DOI:10.1039/c3dt51403j
日期:——
sesquichloride (EASC), all the complexes were highly active towards 1,3-butadiene polymerization, affording polybutadiene with predominant cis-1,4 content (up to 96%). 4a with chlorine atoms at the imine groups exhibited higher catalytic activity than did 5a, indicating that the incorporation of chlorine atoms into the ligand improves the activity. The activity of the complexes in 1,3-butadiene polymerization
双(的新家族Ñ -arylcarboximidoylchloride)吡啶钴(II)配合物与通式[2,6-(ARN CCL)2 ç 5 ħ 3 N]氯化钴2(AR = 2,4,6-ME 3 Ç 6 ħ 2,图4a ; 2,6-我镨2 ç 6 ħ 3,4B ; 2,6-ME 2 ç 6 ħ 3,图4c ; C ^ 6 ħ 5,4D ; 4-氯-2,6--ME 2 C 6ħ 2,4E)和一个典型布鲁克哈特-吉布森式参考络合物[2,6-(2,4,6--ME 3 c ^ 6 ħ 2 Ñ CME)2 ç 5 ħ 3 N]氯化钴2(图5a)的合成和特点。通过X射线晶体学分析确定,配合物4a,4c–e和5a采用三角形双锥体构型,而4b采用了扭曲的方形金字塔形几何形状。与倍半氯化乙基铝(EASC)结合使用时,所有配合物均对1,3-丁二烯聚合具有很高的活性,提供的聚丁二烯主要具有-1,4的顺式含量(最高96