Synthesis of <i>C7</i>,<i>C7‘</i>-Ethylene- and <i>C7</i>,<i>C7‘</i>-Methylene-Bridged <i>C</i><sub>2</sub>-Symmetric Bis(indenyl)zirconium and -titanium Dichlorides
作者:Ronald L. Halterman、David Combs、Masood A. Khan
DOI:10.1021/om971050o
日期:1998.8.1
6-dimethylinden-7-yl)methylidene]titanium dichloride (20) and [dl-bis(4,6-dimethylinden-7-yl)methylidene]zirconium dichloride (21), which were prepared from m-xylene. In addition, [dl-1,2-bis(4-methylinden-7-yl)ethylidene]- and [dl-1,2-bis(4-isopropylinden-7-yl)ethylidene]zirconium dichlorides (dl-12a and dl-12b) and [dl-1,2-bis(4-isopropylinden-7-yl)ethylidene]titanium dichloride (dl-13) were synthesized
我们已经制备了在茚基部分的7,7'-位桥接的几种新型金属茂。新的茂金属包括亚甲基桥连的[ dl-双(4,6-二甲基茚基-7-基)亚甲基]二氯化钛(20)和[ dl-双(4,6-二甲基茚基-7-基)亚甲基]二氯化锆。(21) ,这是从制备米二甲苯。另外,[ dl -1,2-双(4-甲基茚基-7-基)亚乙基]-和[ dl -1,2-双(4-异丙基茚基-7-基)亚乙基]二氯化锆(dl- 12a和dl- 12b)和[ dl-由对甲基异丙基苯和对二甲苯分别合成了1,2-双(4-异丙基茚基-7-基)亚乙基]二氯化钛(dl -13)。通过X射线晶体学测定金属茂二氯化物dl- 12a,dl- 12b和dl- 13的结构,发现在固态下具有C 1对称性,但是在溶液中表现出C 2对称性,如在1 H NMR中所见室温下的光谱。