Back to results
US 6,423,848 B1Granted
Tridentate ligand
AssigneeE. I. Du Pont de Nemours and Company
InventorAlison Margaret Anne Bennett
Life of this patent
Estimating the term…
Abstract
Certain 2,6-pyridinecarboxaldehydebis(imine) and 2,6-diacylpyridinebis(imine) compounds are provided, which are particularly suitable for use as tridentate ligands in iron and cobalt olefin polymerization catalysts.
Claims20
A compound of the formula
- wherein:
- R1, R2 and R3 are each independently hydrogen, hydrocarbyl, substituted hydrocarbyl, or an inert functional group;
- R4 and R5 are each independently hydrogen, hydrocarbyl or substituted hydrocarbyl;
- R8, R12, R13 and R17 are each independently hydrocarbyl, substituted hydrocarbyl or an inert functional group;
- R9, R10, R11, R14, R15 and R16 are each independently hydrogen, hydrocarbyl, substituted hydrocarbyl or an inert functional group;
- and provided that any two of R8, R9, R10, R11, R12, R13, R14, R15, R16 and R17 that are vicinal to one another taken together may form a ring.
3 more elements
Dependencies are inferred from the claim text.