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US 7,067,450 B2Granted
Soluble late transition metal catalysts for olefin oligomerizations III
AssigneeExxonMobil Chemical Patents Inc.
InventorsBaiyi Zhao, Enock Berluche, Smita Kacker, Jo Ann Marie Canich
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Abstract
A series of soluble α-diimine late transition metal catalysts has been invented comprising a substituted or unsubstituted catecholate ligand. The catalysts demonstrate high activity and selectivity for linear α-olefins. As such, these catalysts conveniently oligomerize ethylene. Typical activators as known to those of ordinary skill in the art are used to activate these transition metal catalysts. These catalysts can be used in a supported or unsupported form.
Claims27
A composition comprising:
- (I) a metal selected from nickel or palladium connected to a ligand comprising 1,4-diazabutadiene:
- (a) having a phenyl ring connected to the 1 position of the diazabutadiene, and
- (b) having a phenyl ring connected to the 4 position of the diazabutadiene, and
- (c) where the 2 and 6 positions of both phenyl rings are connected to hydrogen radicals, and
- (d) where the 2 and 3 positions of the diazabutadiene are, each independently, connected to hydrogen or a hydrocarbyl group;
- and
- (II) a catecholate ligand connected to the metal.
4 more elements
Dependencies are inferred from the claim text.