Group 4 permethylindenyl constrained geometry complexes for ethylene polymerisation catalysis
Group 4 permethylindenyl constrained geometry complexes for ethylene polymerisation catalysis
复制标题
DOI：
10.1039/c8cy01374h
复制
发表时间：
2018-10
影响因子：
5
通讯作者：
T. Williams;Jean-Charles Buffet;Zoë R. Turner;D. O′Hare
中科院分区：
文献类型：
--
作者：
T. Williams;Jean-Charles Buffet;Zoë R. Turner;D. O′Hare
本文报道了六种Me_2Sb(RN，I*)TiCl_2({(η_5-C_9Me_6)Me_2Si(RN)}TiC_2；R=i-Pr，t-Bu，n-Bu，Ph，4-t-BuPh和4-n-BuPh)的合成和表征。用单晶X射线衍射法对三个配合物(R=i-Pr，t-Bu和4-t-BuPh)进行了结构表征。与固体聚甲基铝氧烷(SMAO)反应产生对乙烯悬浮相聚合具有活性的固体催化剂。活性随着氨基片段给电子性的增加而增加。ME2Sb(t-BUN，I*)TiCl2的活性为3602KGPE Molti−1h−1bar−1(30分钟，2bar乙烯)，明显高于先前合成的ME2Sb(t-BUN，Cp*)TiCl2。
We report the synthesis and characterisation of six permethylindenyl constrained geometry complexes of the type Me2SB(RN,I*)TiCl2 ({(η5-C9Me6)Me2Si(RN)}TiCl2; R = i-Pr, t-Bu, n-Bu, Ph, 4-t-BuPh and 4-n-BuPh). Three complexes (R = i-Pr, t-Bu and 4-t-BuPh) have been structurally characterised using single crystal X-ray diffraction. Reaction with solid polymethylaluminoxane (sMAO) yields solid catalysts active for the slurry phase polymerisation of ethylene. The activities increase with increasing electron donating character of the amido fragment. Me2SB(t-BuN,I*)TiCl2 exhibits an activity of 3602 kgPE molTi−1 h−1 bar−1 (30 minutes, 2 bar ethylene), an activity significantly greater than the previously synthesised Me2SB(t-BuN,Cp*)TiCl2.