dichloro[η10-2,4-cyclopentadien-1-ylidenebis(4-methoxydiphenylmethylene)[2,7-bis(1,1-di-methylethyl)-9H-fluoren-9-ylidene]]hafnium | 638164-89-3

• 英文名称: dichloro[η10-2,4-cyclopentadien-1-ylidenebis(4-methoxydiphenylmethylene)[2,7-bis(1,1-di-methylethyl)-9H-fluoren-9-ylidene]]hafnium
• CAS: 638164-89-3
• 化学式: C₄₁H₄₂Cl₂HfO₂
• 分子量: 816.179
• InChiKey: NRJPXTVLDSCISG-UHFFFAOYSA-L

反应信息

• 作为产物：
  描述：

  9-[1,3-cyclopentadien-1-yl-bis(4-methoxyphenyl)methyl]-2,7-bis(1,1-dimethylethyl)-9H-fluorene 、 2,7-ditert-butyl-9-[cyclopenta-1,4-dien-1-yl-bis(4-methoxyphenyl)methyl]-9H-fluorene 、 氯化铪 在 n-C₄H₉Li 作用下， 以 乙醚 为溶剂， 生成 dichloro[η10-2,4-cyclopentadien-1-ylidenebis(4-methoxydiphenylmethylene)[2,7-bis(1,1-di-methylethyl)-9H-fluoren-9-ylidene]]hafnium
  参考文献：
  名称：

  Cs-symmetric hafnocene complexes for synthesis of syndiotactic polypropene

  摘要：

  Three new C-s-symmetric ansa-hafnocene complexes such as dichloro[eta(10)-2,4-cyclopentadienyl-1-ylidenebis(4-methyldiphenylmethylen)[2,7-bis(1,1-di-methylethyl)-9H-fluorene-9-ylidene]]hafnium (2) were synthesized which produce partiell syndiotactic polypropylenes with very high molecular weights. The influence of the methyl and methoxy substitution in the bridge was studied on the activity, tacticity, and molar mass. The hafhocene-MAO catalysts (1-4) were active up to polymerisation temperatures of 90 degreesC and produces 55 000 kg polymer in 1 h by 1 mol of hafnocene. The molecular weight of the obtained elastic polypropylene reaches 2.2 million g mol(-1). (C) 2003 Published by Elsevier B.V.

  DOI：

  10.1016/s0022-328x(03)00731-9