Patent ID: 6900152

Claim:
A catalyst for trimerizing ethylene, comprising: (i) an organic metal complex having a neutral tridentate ligand having a tripod structure represented by the following formula (1): AMQ n (1) wherein A is a neutral tridentate ligand having a tripod structure represented by the following formula (2) or formula (3): wherein j, k and m independently represent an integer of 0 to 6, each D 1 independently represents a divalent hydrocarbon group which may have a substituent, each L 1 independently represents a substituent containing a nitrogen atom or a substituent containing and an element of group 16 of the periodic table, G 1 represents a carbon atom, R 1 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms which may have a substituent, or an aryl group having 6 to 10 carbon atoms which may have a substituent, wherein a, b and c independently represent an integer of 0 to 6, u represents an integer of 0 or 1, each D 2 independently represents a divalent hydrocarbon group which may have a substituent, each L 2 independently represents a substituent containing a nitrogen atom or an element of group 16 of the periodic table, G 2 represents a nitrogen or phosphorus atom when u is 0 or a phosphorus atom when u is 1, R 2 represents an oxygen or sulfur atom, M is a transition metal atom of group 3 to group 10 of the periodic table, each Q is independently selected from the group consisting of a hydrogen atom, a halogen atom, a straight chain or branched alkyl group having 1 to 10 carbon atoms which may have a substituent, and an aryl group having 6 to 10 carbon atoms which may have a substituent, and n is an integer equal to a formal oxidation state of M, and (ii) an alkylaluminoxane.