发明授权
US07005489B2 Zwitterionic Metallocycles 有权
两性离子金属环

Zwitterionic Metallocycles
摘要:
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.
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