Patent ID: 6703459
Filing Date: 2004-03-09
Classification: C08F

Abstract:
A transition metal compound represented by the following general formula [1]:MR1kR2mR3nQhâ€ƒâ€ƒ[1]wherein R1 is selected from the group consisting of ligands having at least one nitrogen, sulfur, phosphorus or oxygen atom; R2 is a ligand comprising cyclic hydrocarbons having &pgr;-electrons, and R1 and R2 may be crosslinked with each other; R3 is selected from the group consisting of ligands comprising a hydrogen atom, alkyl groups, aryl groups, silicon-containing alkyl groups and silicon-containing aryl groups; M is a metal selected from scandium, yttrium, lanthanide series transition metals and actinide series transition metals; Q is selected from the group consisting of halogen atoms and electron-donating ligands; when two or more ligands are represented by each of these symbols, they may be the same or different; k is an integer of 1 to 4; and m, n and h are each 0 or an integer of 1 to 4, the compound being characterized in that R1 is a ligand represented by any of the following general formula [2], [3] and [4]: wherein R4 is selected from the group consisting of a hydrogen atom, alkyl groups and aryl groups; R5 and R6 are each selected from the group consisting of alkyl groups, aryl groups, silicon-containing alkyl groups and silicon-containing aryl groups; X1 is selected from the group consisting of a carbon atom and silicon atom, where X1 may be the same or different if X1 is more than one and i is an integer of 1 to 6; wherein R7, R8 and R9 are each selected from the group consisting of alkyl groups, aryl groups, silicon-containing alkyl groups and silicon-containing aryl groups, where R7, R8 and R9 may be the same or different if j is more than one; and j is 0 or an integer of 1 to 4; wherein R10 is selected from the group consisting of a hydrogen atom, alkyl groups and aryl groups; R11, R12, R13 and R14 are each selected from the group consisting of alkyl groups, aryl groups, silicon-containing alkyl groups and silicon-containing aryl groups; X2 is selected from the group consisting of a carbon atom and a silicon atom, X2 may be the same or different if 1, p and q is more than one; and 1, p and q are each 0 or an integer of 1 to 4.