A-olefin oligomer and production method thereof

A meso transition metal compound of formula (I):

• wherein
• M is a metal element of Groups 3 to 10 in the Periodic Table;
• X is a σ-bonding ligand, in which when there are plural ligands represented by X, the plural ligands may be the same as or different from each other;
• Y is a Lewis base, in which when there are plural Lewis bases represented by Y, the plural Lewis bases may be the same as or different from each other;
• A and A′ are each independently a crosslinking group selected from the group consisting of a hydrocarbon group having from 1 to 20 carbon atoms, a halogen-containing hydrocarbon group having from 1 to 20 carbon atoms, a silicon-comprising group, a germanium-comprising group and a tin-comprising group, in which A and A′ are different from each other;
• m and n are each an integer of 1 or more, in which m and n are different from each other, and m+n is 3 or more;
• q is an integer of from 1 to 5, which is ((valency of M)−2);
• r is an integer of from 0 to 3;
• and
• E is a group of formula (II), in which two groups represented by E may be the same as or different from each other:
• wherein
• R2 is each independently a group selected from the group consisting of a hydrogen atom, a halogen atom, a hydrocarbon group having from 1 to 20 carbon atoms, a halogen-comprising hydrocarbon group having from 1 to 4 carbon atoms, a silicon-comprising group and a hetero atom-comprising group;
• and
• the bonds shown with the wavy line represent bonds to -(A)m- and -(A′)n-.

A method for producing an α-olefin oligomer, comprising polymerizing an α-olefin with a polymerization catalyst comprising:

• (A) a meso transition metal compound of formula (I), and
• (B) at least one component selected from the group consisting of (B-1) a compound that is capable of forming an ionic complex through reaction with the transition metal compound as the component (A) or a derivative thereof, and (B-2) aluminoxane:
• wherein in formula (I),
• M is a metal element of Groups 3 to 10 in the Periodic Table;
• X is a σ-bonding ligand, in which when there are plural ligands represented by X, the plural ligands may be the same as or different from each other;
• Y is a Lewis base, in which when there are plural Lewis bases represented by Y, the plural Lewis bases may be the same as or different from each other;
• A and A′ are each independently a crosslinking group selected from the group consisting of a hydrocarbon group having from 1 to 20 carbon atoms, a halogen-comprising hydrocarbon group having from 1 to 20 carbon atoms, a silicon-comprising group, a germanium-comprising group and a tin-comprising group, in which A and A′ are different from each other;
• m and n are each an integer of 1 or more, in which m and n are different from each other, and m+n is 3 or more;
• q is an integer of from 1 to 5, which is ((valency of M)−2);
• r is an integer of from 0 to 3;
• and
• E is a group of formula (II), in which two groups represented by E may be the same as or different from each other:
• wherein in formula (II),
• R2 is each independently a group selected from the group consisting of a hydrogen atom, a halogen atom, a hydrocarbon group having from 1 to 20 carbon atoms, a halogen-comprising hydrocarbon group having from 1 to 4 carbon atoms, a silicon-comprising group and a hetero atom-comprising group;
• and
• the bonds shown with the wavy line represent bonds to -(A)m- and -(A′)n-.