Asymmetric Metallocene Catalysts Based on Dibenzothiophene: A New Approach to High Molecular Weight Polypropylene Plastomers
作者:Sandra Deisenhofer、Tanja Feifel、Jürgen Kukral、Martti Klinga、Markku Leskelä、Bernhard Rieger
DOI:10.1021/om030212f
日期:2003.8.1
series of new sulfur-containing C1-symmetric metallocenes, rac-[1-(9-η5-fluorenyl)-2-(2-methylbenzo[b]indeno[4,5-d]thiophen-1-η5-yl)ethane]zirconium dichloride (7a), rac-[1-(9-η5-fluorenyl)-2-(2-methylbenzo[b]indeno[4,5-d]thiophen-1-η5-yl)ethane]hafnium dichloride (7b), rac-[1-(9-η5-fluorenyl)-2-(2-methylbenzo[b]indeno[4,5-d]thiophen-1-η5-yl)ethane]hafnium dimethyl (7c), and rac-[1-(9-η5-fluorenyl)-
了一系列新的含硫的合成和聚合数据Ç 1 -对称的金属茂,外消旋[1-(9-η - 5 -芴基)-2-(2-甲基苯并[ b ]茚并[4,5- d ]噻吩-1-η 5 -基)乙烷]二氯化锆(图7a),外消旋- [1-(9-η 5 -芴基)-2-(2-甲基苯并[ b ]茚并[4,5- d ]噻吩1 -η 5 -基)乙烷]二氯化铪(图7b),外消旋- [1-(9-η 5 -芴基)-2-(2-甲基苯并[ b ]茚并[4,5- d ]噻吩-1-η 5基)乙烷]合铪二甲基(7C),和外消旋- [1-(9-η 5 -芴基)-2-(2-甲基苯并[ b ]茚并[4,5- d ]噻吩-3--η 5 -报道了[ yl)乙烷]二氯化锆(8)。这些配合物的特征结构特征是衍生自二苯并噻吩的2-甲基-1 H-苯并[ b ]茚并[4,5- d ]噻吩部分(3:MBIT)。在7a - c的情况下,MBIT单元显示“向后”方向,而在8a