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Abstract

A novel dinuclear metallocene complex is disclosed, which is represented by the following formula (I): ##STR1## wherein M.sup.1 and M.sup.2 are the same or different and are independently selected from the group consisting of Group IIIB, Group IVB and Group VB transition metals; each X is the same or different and is indepedently an anionic ligand with -1 valence, which is selected from the group consisting H, C.sub.1-20 hydrocarbyl, halogen, C.sub.1-20 alkoxy, C.sub.1-20 aryloxy, NH.sub.2, NHR.sup.11, NR.sup.11 R.sup.12, --(C.dbd.O)NH.sub.2, --(C.dbd.O)NHR.sup.13, and --(C.dbd.O)NR.sup.13 R.sup.14, wherein R.sup.11, R.sup.12, R.sup.13 and R.sup.14 are C.sub.1-20 alkyl; i is an integer from 1 to 3; j is an integer from 1 to 3, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, and R.sup.8 are the same or different and are independently H, a C.sub.1-20 linear, branched or cyclic hydrocarbyl group, or a C.sub.2-4 cyclic hydrocarbylene group which forms a C.sub.4-6 fused ring system; Y.sup.1 and Y.sup.2 are the same or different and each is an electron-donating group independently selected from a Group 15 or Group 16 element; R.sup.9 and R.sup.10 are the same or different and each is a divalent radical selected from (--C(R.sup.15).sub.2 --).sub.p, (--Z(R.sup.15).sub.2 --).sub.p, or (--Z(R.sup.15).sub.2 --C(R.sup.15).sub.2 --).sub.p, Z being silicon, germanium, or tin, R.sup.15 being C.sub.1-6 alkyl, p being an integer from 1 to 4; R.sup.16 is a divalent unsubstituted or alkyl-substituted cyclic alkylene group; and each R.sup.17 is independently a C.sub.1-20 linear, branched or cyclic hydrocarbyl group. By using the dinuclear metallocene complex as the catalyst, a high molecular weight olefin polymer can be obtained.

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