Metallocene compound, process for producing metallocene compound, olefin polymerization catalyst, process for producing polyolefin, and polyolefin

A process for preparing a metallocene compound, comprising selectively preparing a metallocene compound represented by the following formula (1b) or (2b) from a cyclopentadiene represented by the following formula (19b) as a starting material which is free of isomer represented by formula (20b), said process comprising the steps of:

• converting the cyclopentadiene of formula (19b) to a precursor compound represented by the following formula (13b) or (14b),
• converting the precursor compound of formula (13b) or (14b) to a ligand precursor represented by the formula (7b) or (8b), and
• forming the metallocene compound represented by the following formula (1b) or (2b) from the ligand precursor represented by the formula (7b) or (8b);
• wherein R21 and R22 may be the same or different and are each selected from a hydrocarbon group or a silicon-containing hydrocarbon group;
• R5, R6, R7, R8, R9, R10, R11, R12, R13 and R14 may be the same or different and are each selected from a hydrogen atom, a hydrocarbon group and a silicon-containing hydrocarbon group;
• of the groups indicated by R5 to R12, neighboring groups may be bonded to from a ring;
• and
• when R22 is tert-butyl and R13 and R14 are methyl, R6, R7, R10 and R11 are not all hydrogen;
• when all of R5 to R12 are hydrogen, R22 is a hydrocarbon other than phenyl, when R7 and R10 are both tert-butyl, and R5, R6, R8, R9, R11 and R12 are all hydrogen, R22 is not methyl, tert-butyl or trimethylsilyl;
• A is a divalent hydrocarbon group of 2 to 20 carbon atoms which may contain an unsaturated bond and/or an aromatic ring;
• A may contain two or more cyclic structures including a ring formed by A in cooperation with Y;
• M is a metal selected from Group 4 of the periodic table;
• Y is a carbon atom or a silicon atom;
• j is an integer of 1 to 4;
• Q is selected from the group consisting of a halogen atom, a hydrocarbon group, an anionic ligand and a neutral ligand capable of coordination by a lone pair;
• and when j is 2 or greater, each Q may be the same or different.