Dehydrocoupling polymerization of arylsilanes with chloro(aryloxy)bis(cyclopentadienyl)zirconium complex catalysts
作者:Yasushi Obora、Masato Tanaka
DOI:10.1016/s0022-328x(99)00495-7
日期:2000.1
Abstract Complexes generated by treating chloro(aryloxy)bis(cyclopentadienyl)zirconium [ 3 ; aryloxy=2,6-di- tert -butyl-4-methylphenoxy ( 3a ), 2,6-diisopropylphenoxy ( 3b ), phenoxy ( 3c ), 2,3,4,5,6-pentafluorophenoxy ( 3d ), and 2,6-dimethoxyphenoxy ( 3e )] with one equivalent of n -BuLi catalyze dehydrocoupling polymerization of arylsilanes 1 [aryl=phenyl ( 1a ), p -methoxyphenyl ( 1b ), p -dimethylaminophenyl
摘要 处理氯(芳氧基)双(环戊二烯基)锆生成的配合物 [ 3 ; 芳氧基=2,6-二叔丁基-4-甲基苯氧基(3a)、2,6-二异丙基苯氧基(3b)、苯氧基(3c)、2,3,4,5,6-五氟苯氧基(3d)和2 ,6-二甲氧基苯氧基(3e)]与1当量n-BuLi催化芳基硅烷1脱氢偶联聚合[芳基=苯基(1a),对甲氧基苯基(1b),对二甲氨基苯基(1c),对甲噻吩(1d)]在室温下得到相应的聚硅烷。将它们的催化性能与由二氯双(环戊二烯基)锆(4)和两个当量的正丁基锂生成的常规体系进行了比较。1a 与 3a / n -BuLi、3b / n -BuLi 或 3c / n -BuLi 反应得到高分子量聚硅烷(M w =13.3×10 3 和 M n =5.8×10 3 与 3a ;M w =10.4×10 3 和M n =4。2×10 3 与 3b ; M w =8.8×10 3 和M n =5