Transition metal compound and catalyst for olefin polymerization

A transition metal compound represented by the formula (1-2):

• wherein M represents a transition metal atom of the Group 3, 4, 5, Group lanthanide or Group actinide of the periodic table,
• (i) R1 and R2 are the same as, or different from each other, and represent an alkyl group having 1 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• a cycloalkyl group having 3 to 10 carbon atoms and optionally having a halogen atom as a substituent,
• an alkenyl group having 2 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• an alkynyl group having 2 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• an aralkyl group having 7 to 20 carbon atoms and optionally having a halogen atom as a substituent, or
• an aryl group having 6 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• (ii) R3 and R4 are the same as, or different from each other, and represent a hydrogen atom,
• an alkyl group having 1 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• a cycloalkyl group having 3 to 10 carbon atoms and optionally having a halogen atom as a substituent,
• an alkenyl group having 2 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• an alkynyl group having 2 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• an aralkyl group having 7 to 20 carbon atoms and optionally having a halogen atom as a substituent, or
• an aryl group having 6 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• (iii) R5 to R8 are the same as, or different from one another, and represent a hydrogen atom,
• an alkyl group having 1 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• a cycloalkyl group having 3 to 10 carbon atoms and optionally having a halogen atom as a substituent,
• an alkenyl group having 2 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• an alkynyl group having 2 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• an aralkyl group having 7 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• an aryl group having 6 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• an alkoxy group having 1 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• an aralkyloxy group having 7 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• an aryloxy group having 6 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• a silyl group optionally having, as a substituent, a hydrocarbyl group or a halogenated hydrocarbyl group having 1 to 20 carbon atoms,
• an amino group optionally having, as a substituent, a hydrocarbyl group or a halogenated hydrocarbyl group having 1 to 20 carbon atoms, or
• a heterocyclic compound residue,
• (iv) R1 and R3, R2 and R4, R5 and R6, R5 and R7, or R7 and R8 may be taken together with each other to form a ring, wherein the ring may have a substituent;
• A2 represents a —[Z(R11)(R12)]n-group, wherein Z represents a silicon atom, a germanium atom, a tin atom or a carbon atom, R11 and R12 are the same as, or different from each other, and represent a hydrogen atom,
• an alkyl group having 1 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• a cycloalkyl group having 3 to 10 carbon atoms and optionally having a halogen atom as a substituent,
• an aryl group having 6 to 20 carbon atoms and optionally having a halogen atom as a substituent, or
• a silyl group optionally having, as a substituent, a hydrocarbyl group or a halogenated hydrocarbyl group having 1 to 20 carbon atoms, and
• n represents 1, 2, 3 or 4, and when plural Zs, R11s or R12s exist, they may be the same as, or different from one another,
• X represents a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom,
• an alkyl group having 1 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• a cycloalkyl group having 3 to 10 carbon atoms and optionally having a halogen atom as a substituent,
• an aralkyl group having 7 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• an aryl group having 6 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• an alkoxy group having 1 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• an aralkyloxy group having 7 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• an aryloxy group having 6 to 20 carbon atoms and optionally having a halogen atom as a substituent,
• a silyl group optionally having, as a substituent, a hydrocarbyl group or a halogenated hydrocarbyl group having 1 to 20 carbon atoms,
• an amino group optionally having, as a substituent, a hydrocarbyl group or a halogenated hydrocarbyl group having 1 to 20 carbon atoms,
• a thiolate group optionally having, as a substituent, a hydrocarbyl group or a halogenated hydrocarbyl group having 1 to 20 carbon atoms, or
• a carboxylate group optionally having, as a substituent, a hydrocarbyl group or a halogenated hydrocarbyl group having 1 to 20 carbon atoms, and when plural Xs exist, they are the same as, or different from each other, and adjacent Xs may be taken together with each other to form a ring;
• k represents 1, 2 or 3;
• L represents a neutral Lewis base, and when plural Ls exist, plural Ls are the same as, or different from each other;
• m represents 0, 1, 2, 3 or 4;
• the sum of k and m is 2, 3 or 4.