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Abstract

The present invention provides a metallocene compound which produces an olefin polymer having a high molecular weight with a high stereoregularity. The metallocene compound has the following formula (1): Q(C.sub.5 H.sub.4-m R.sup.1.sub.m)(C.sub.5 H.sub.4-n R.sup.2.sub.n)MXY (1) wherein (C.sub.5 H.sub.4-m R.sup.1.sub.m) and (C.sub.5 H.sub.4-n R.sup.2.sub.n) each independently represent a cyclopentadienyl group; C.sub.5 H.sub.4-m and C.sub.5 H.sub.4-n each independently represent a cyclopentadienyl ring; m represents an integer of 1-3; n represents an integer of 2 or 3; R.sup.1 and R.sup.2 are each independently a substituent bonded respectively to C.sub.5 H.sub.4-m and C.sub.5 H.sub.4-n, and represent a hydrocarbon group of 1-20 carbon atoms, a silicon-containing hydrocarbon group of 1-20 carbon atoms or a heteroaromatic group; each R.sup.1.sub.m and each R.sup.2.sub.n may be the same or different; one pair of R.sup.2 's in the R.sup.2.sub.n are bonded to each other to form at least one ring; Q represents a divalent group for cross-linking (C.sub.5 H.sub.4-m R.sup.1.sub.m) and (C.sub.5 H.sub.4-n R.sup.2.sub.n); M represents a titanium atom, a zirconium atom or a hafnium atom; and X and Y are the same or different and each a hydrogen atom, a halogen atom or a hydrocarbon group.

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First Claim