Patent ID: 6339135
Filing Date: 2002-01-15
Classification: B01J,C07F,C08F,Y10S

Abstract:
A transition metal compound represented by the general formula (II): wherein M is a metallic element in the group 4 of the periodic table; X1 is a &sgr;-bonding ligand, and when a plurality of X1s are present, these plural X1s may be the same or different, and each X1 may crosslink with another X1 or Y1; Y1 is a Lewis base, and when a plurality of Y1s are present, these plural Y1s may be the same or different, and each Y1 may crosslink with another Y1 or X1; A1 and A2 each are independently a crosslinking group selected from the group consisting of methylene group, ethylene group, ethylidene group, propylidene group, isopropylidene group, cyclohexylidene group, 1,2-cyclohexylene group, and vinylidene group; q is an integer of 1 to 5 and equal to the valence of M minus 2; r is an integer of 0 to 3; and R1 to R6 are each a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, or a halogen-containing hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing group or a hetero-atom-containing group, but at least one of R1 to R6 is not a hydrogen atom, and they may be the same or different, and the adjacent groups of R1 to R6 may bond to each other to form a ring.