Patent ID: 6995279

Claim:
A metallocene compound represented by the following general formula (1): Y q KLMX 2 (1) wherein M represents a titanium atom, a zirconium atom or a hafnium atom; Y represents a linking group bridging K and L and is a methylene group, an ethylene group, a tetraalkylethylene group having alkyl of 1–6 carbon atoms, a dialkylmethylene group having alkyl of 1–6 carbon atoms, a divalent linking group containing within a backbone thereof, an aryl group of 6–16 carbon atoms or a halogenated aryl group of 6–16 carbon atoms, or a divalent linking group containing a silicon atom, a germanium atom, an oxygen atom, a nitrogen atom, a phosphorous atom or a boron atom, or alternatively, Y represents a divalent linking group formed by connecting in series at least two linking groups selected from the foregoing linking groups; q is an integer representing the number of Y and is 1; K and L each represent an indenyl group, wherein at least one hydrogen atom of the hydrogen atoms possessed by K or by L is each independently replaced by an alkyl group of 1–10 carbon atoms, a halogen-containing alkyl group of 1–10 carbon atoms, a silicon-containing alkyl group of 1–10 carbon atoms, an aryl group of 6–16 carbon atoms, a halogen-containing aryl group of 6–16 carbon atoms, an alkenyl group of 2–10 carbon atoms, an arylalkyl group of 7–40 carbon atoms, an alkylaryl group of 7–40 carbon atoms, an alicyclic hydrocarbon group of 3–16 carbon atoms, a siloxyl group, an alkoxyl group, a halogen atom, an amino group, a dialkyl-substituted amino group, a SR a group (S represents a sulfur atom and R a represents a halogen atom, an alkyl group of 1–10 carbon atoms or an aryl group of 6–16 carbon atoms), or a PR b 2 group (P represents a phosphorous atom; and two R b s may be the same or different and each represents a halogen atom, an alkyl group of 1–10 carbon atoms or an aryl group of 6–16 carbon atoms), with the proviso that at least the substituents at the 2-positions of K and L differ from each other; and the difference between the numbers of carbon atoms in the two substituents is in the range of from 3 to 10; and two Xs may be the same or different and each represents a halogen atom, an alkyl group of 1–6 carbon atoms, an aryl group of 6–16 carbon atoms, an alkylaryl group having alkyl of 1–6 carbon atoms and aryl of 6–16 carbon atoms, or an arylalkyl group having aryl of 6–16 carbon atoms and alkyl of 1–6 carbon atoms, which atom or group is bonded to M.