A new class of zwitterionic metallocycles is disclosed. A positively charged Group 4-10 transition metal is chelated to two heteroatoms and one of the heteroatoms has a substituent bearing a negative charge. We have found that substitution in this position stabilizes the zwitterion form of the metallocycle. The zwitterionic metallocycle is useful for olefin polymerizations.
披露了一种新的带有离子性的
金属环化合物类。一个带有正电荷的4-10族过渡
金属与两个杂原子螯合,其中一个杂原子具有一个带有负电荷的取代基。我们发现在这个位置进行取代可以稳定
金属环的离子形式。这种离子性
金属环化合物对烯烃聚合很有用。