Patent ID: 6184402
Filing Date: 2001-02-06
Classification: C07F,C08F,Y10S

Abstract:
A process for the preparation of metallocene complexes which comprises converting a part of an isomeric mixture of a metallocene complex represented by the formula (1): ##STR5##wherein M stands for a transition metal belonging Group III, IV, V, VI, Lantanoid or Actinoid of the Periodic Table, n stands for an integer of 1 or 2, Y stands for carbon, silicon, germanium or tin, X's may be the same or different and each independently stands for a halogen atom, a halogenoid atomic group, a hydrocarbon group having 1-20 carbon atoms which may contain a silicon, germanium, oxygen, sulfur, or nitrogen, or a monocyclic or polycyclic heteroaromatic group which may contain a hetero atom or atoms selected from the group consisting of oxygen atoms, sulfur atoms and nitrogen atoms in the 5-membered or 6-membered ring or rings thereof and which may be substituted on the ring or rings thereof by other substituents, R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10 may be the same or different and each stands for hydrogen, an alkyl group having 1-20 carbon atoms, a cycloalkyl group having 3-20 carbon atoms, an alkenyl group with 2-20 carbon atoms, an aryl group having 6-20 carbon atoms, an alkylaryl group having 7-20 carbon atoms, or an aralkyl group having 7-20 carbon atoms with the proviso that these groups may contain a silicon, germanium, oxygen, sulfur, or nitrogen, or a monocyclic or polycyclic heteroaromatic group which may contain a hetero atom or atoms selected from the group consisting of oxygen atoms, sulfur atoms and nitrogen atoms in the 5-membered or 6-membered ring or rings thereof and which may be substiututed on the ring or rings by other substituents with the proviso that the adjacent substituents on the cyclopentadienyl groups may form together a cyclic structure having 5-8 carbon atoms and the cyclic structure may be an aromatic ring, and that R9 and R10 may form together with Y a cyclic structure having 4-8 atoms and which may contain oxygen, sulfur and nitrogen, into a complex containing M--O bond, and then separating it.