Patent ID: 6171994
Filing Date: 2001-01-09
Classification: C07C,C07F,C08F,Y10S

Abstract:
A transition metal compound represented by the general formula ##STR46##wherein,M is a metallic element in the Groups 3 to 10 or the lanthanide series of the Periodic Table;E.sup.1 and E.sup.2 may be the same or different and are each a .sigma.-bonding or .pi.-bond ligand crosslinked with each other via (A.sup.1).sub.p,(A.sup.2).sub.p, . . .(A.sup.n) and (D).sub.s,wherein E.sup.1 is selected from the group consisting of a cyclopentadienyl group, a substituted cyclopentadienyl group, an indenyl group, a substituted indenyl group, a heterocyclopentadienyl group, a substituted heterocyclopentadienyl group, --N<, --P<, >CR.sup.1 --, >C<, >SiR.sup.1 -- and >Si<, wherein R.sup.1 is selected from the group consisting of hydrogen, a hydrocarbon group having 1 to 20 carbon atoms, and a hetero-atom-containing group,and wherein E.sup.2 is selected from the group consisting of a cyclopentadienyl group, a substituted cyclopentadienyl group, an indenyl group, a substituted indenyl group, a heterocyclopentadienyl group, a substituted heterocyclopentadienyl group, --N<, --NR.sup.2 --, --P<, --PR.sup.2 --, --O--, --S--, --Se--, --C(R.sup.2).sub.2 --, >CR--, >C<, --Si(R.sup.2).sub.2 --, >SiR.sup.2 -- and >Si<, wherein R.sup.2 is selected from the group consisting of hydrogen, a hydrocarbon group having 1 to 20 carbon atoms, and a hetero-atom-containing group;X is a .sigma.-bonding ligand, and wherein when a plurality of X's are present, said X's may be the same or different and each X may crosslink with another X, E.sup.1, E.sup.2 or Y;Y is a Lewis base, and wherein when a plurality of Y's are present, said Y's may be the same or different and each Y may crosslink with another Y, E.sup.1, E.sup.2 or X;A.sup.1, A.sup.2, . . . A.sup.n may be the same or different and are each independently a crosslinking group having a crosslink consisting of at least one element selected from the group consisting of C, Si, Ge, Sn, Al, P, N, 0, S, and Se, and wherein at least one of A.sup.1, A.sup.2, . . .A.sup.n comprises a crosslink consisting of carbon alone;D is a crosslinking group having a crosslink consisting of at least one element selected from the group consisting of C, Si, Ge, Sn, B, Al, P and N, and wherein when a plurality of D's are present, said D's may be the same or different;n is an integer of 2 to 4;p is an integer of 1 to 4, wherein the respective p's of A.sup.1, A.sup.2, . . .A.sup.n may be the same or different;q is an integer of 1 to 5 and is equal to the valence of M minus 2;r is an integer of 0 to 3; ands is an integer of 0 to 4, and wherein when s is 0, (A.sup.1).sub.p, (A.sup.2).sub.p, . . .(A.sup.n).sub.p are directly bonded to E.sup.2.