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US 6,974,878 B2Granted
Catalyst ligands, catalytic metal complexes and processes using same
AssigneeSymyx Technologies, Inc.
InventorsAnil Guram, Cheryl Lund, Howard W. Turner, Tetsuo Uno
Life of this patent
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Abstract
A new ligands that include a benzene ring in the backbone can be combined with a metal or metal precursor compound or formed into a metal-ligand complex catalyze a number of different chemical transformations, including olefin polymerization reactions. The ligands, complexes formed with the ligands and compositions including the ligands are useful catalysts, depending on the reaction.
Claims27
A complex characterized by one of the following general formulas:
- wherein each R1, R2, R3, R4 R5 and R6 is independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, heteroalkyl, heterocycloalkyl, substituted heterocycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, alkoxy, aryloxy, silyl, boryl, phosphino, amino, thio, seleno, and combinations thereof;
- optionally, R1 and R2 are joined together in a ring structure and/or R4 and R5 are joined together in a ring structure;
- G is either nitrogen or oxygen and a is 0 or 1 depending on G;
- b is 0, 1, 2, 3 or 4;
- M is a transition metal selected from the group consisting of Groups 3, 4, 5, 6, 7, 8, 9 and 10 of the Periodic Table of Elements;
- L is independently each occurrence, a ligand;
- n is a number 0, 1, 2, 3, 4, and 5;
- and
- m is 1, 2, 3 or 4.
6 more elements
Dependencies are inferred from the claim text.