| 主权项 |
1. A metallocene catalyst compound represented by the formula:wherein,
R2 and R8 are not the same; R4 and R10 are substituted phenyl groups and are not the same, R4 is a phenyl group substituted at the 2′ position with an aryl group or is a phenyl group substituted at the 3′ and 5′ positions with a C1 to C10 alkyl group or aryl group or combinations thereof R10 is a phenyl group substituted at the 2′ position with an aryl group; or a phenyl group substituted at the 3′ and 5′ positions with a C1 to C 10 alkyl group or aryl group or combinations thereof; M is a group transition 2, 3, or 4 metal; T is a bridging group; each X is an anionic leaving group; each R1, R3, R5, R6, R7, R9, R11R12R13and R14 is, independently, hydrogen, or a hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, silylcarbyl, substituted silylcarbyl, germylcarbyl, or substituted germylcarbyl substituents; R2 is a substituted or unsubstituted C3-C12 cycloaliphatic group or is a methylene substituted with a substituted or unsubstituted C3-C12 cycloaliphatic group or an ethylene substituted with a substituted or unsubstituted C3-C12 cycloaliphatic group, wherein the C3-C12 cycloaliphatic group can be substituted at one or more positions with a C1-C10 alkyl group; and R8 is a halogen atom, a C1-C10 alkyl group which is optionally halogenated, a C6-C10 aryl group which is optionally halogenated, a C2-C10 alkenyl group, a C7-C40 arylalkyl group, a C7-C40 alkylaryl group, a C8-C40 arylalkenyl group, a —NR′2, —SR′, —OR′, —OSiR′3 or —PR′2 radical, wherein R′ is a halogen atom, a C1-C10 alkyl group, or a C6-C10 aryl group. |
