Zwitterionic Metallocycles

Details Zwitterionic Metallocycles Zwitterionic Metallocycles

2006-02-28

2006-02-28

Wu, David W. (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S134000, C526S348000, C556S051000, C556S032000, C556S007000, C556S027000, C556S030000

Reexamination Certificate

active

07005489

ABSTRACT:
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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