Patent ID: 6337297
Filing Date: 2002-01-08
Classification: B01J,C07C,Y02P

Abstract:
A catalyst for trimerization of ethylene which comprises:(a) a chromium complex having a neutral multidentate ligand having a tripod structure, represented by the following formula (1): ACrJnQ3-nâ€ƒâ€ƒ(1) wherein A is a neutral multidentate ligand having a tripod structure, J is a carbonyl ligand or a halogen atom, n is an integer of 0 to 3, and Q is at least one member selected from the group consisting of a hydrogen atom, a hydrocarbon group having 1 to 10 carbon atoms, a carboxylate group having 1 to 10 carbon atoms, a diketonato group having 3 to 10 carbon atoms, an amide group, an imide group, an alkoxide group having 1 to 10 carbon atoms, a thioalkoxide group having 1 to 10 carbon atoms, an arene ligand having 6 to 15 carbon atoms, an alkene ligand having 2 to 10 carbon atoms, an alkene ligand having 2 to 15 carbon atoms, an amine ligand, an imine ligand, a nitrile ligand, an isonitrile ligand, a phosphine ligand, a phosphine oxide ligand, a phosphite ligand, an ether ligand, a sulfide ligand, a sulfone ligand and a sulfoxide ligand, and(b) an alkyl group containing compound; said neutral multidentate ligand A in formula (1) being represented by the following formula (2) or formula (3): â€ƒwherein j, k and m independently represent an integer of 0 to 6, each D1 independently represents a divalent hydrocarbon group which may have a substituent, each L1 independently represents a substituent containing an element of group 14, 15, 16 or 17 of the periodic table, with the proviso that all of the three L1s are not concurrently a substituent containing an element of group 14 or 17, G1 represents a carbon or silicon atom, and R1 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 10 carbon atoms; â€ƒwherein a, b and c independently represent an integer of 0 to 6; u represents an integer of 0 or 1; each D2 independently represents a divalent hydrocarbon group which may have a substituent; each L2 independently represents a substituent containing an element of group 14, 15, 16 or 17 of the periodic table, with the proviso that all of the three L2s are not concurrently a substituent containing an element of group 14 or 17; G2 represents a nitrogen or phosphorus atom when u is 0 or a phosphorus atom when u is 1, and R2 represents an oxygen or sulfur atom.