A metallocene -compound represented by the formula: wherein, R 2 and R 8 are not the same; R 4 and R 10 are substituted phenyl groups and are not the same; wherein R 4 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 C 1 to a C 10 alkyl groups or aryl groups and combinations thereof, wherein, when R 4 is a phenyl group which is further substituted with an aryl group, the two groups bound together are optionally joined together directly or by linker groups, wherein the linker group is an alkyl, vinyl, phenyl, alkynyl, silyl, germyl, amine, ammonium, phosphine, phosphonium, ether, thioether, borane, borate, alane or aluminate groups; R 10 is 1) a phenyl group substituted at the 2' position with an aryl group; or 2) a phenyl group substituted at the 3' and 5' positions with C 1 to a C 10 alkyl groups or aryl groups and combinations thereof; M is a group transition 2, 3 or 4 metal; T is a bridging group, wherein T is represented by the formula R a 2 J, where J is C, Si, or Ge, and each R a is, independently, hydrogen, halogen, C 1 to C 20 hydrocarbyl or a C 1 to C 20 substituted hydrocarbyl, and two R a can form a cyclic structure including aromatic, partially saturated, or saturated cyclic or fused ring system.; each X is an anionic leaving group; each R 1, R 3, R 5, R 6, R 7, R 9, R 11, R 12, R 13, and R 14 is, independently, hydrogen, or a hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, silylcarbyl, substituted silylcarbyl, germylcarbyl, or substituted germylcarbyl substituents; R 2 is a substituted or unsubstituted C 3 -C 12 cycloaliphatic group or is a methylene substituted with a substituted or unsubstituted C 3 -C 12 cycloaliphatic group or an ethylene substituted with a substituted or unsubstituted C 3 -C 12 cycloaliphatic group, wherein the C 3 -C 12 cycloaliphatic group can be substituted at one or more positions with a C 1 -C 10 alkyl group; and R 8 is a halogen atom, a C 1 -C 10 alkyl group which is optionally halogenated, a C 6 -C 10 aryl group which is optionally halogenated, a C 2 -C 10 alkenyl group, a C 7 -C 40 -arylalkyl group, a C 7 -C 40 alkylaryl group, a C 8 -C 40 arylalkenyl group, a -NR' 2, -SR', -OR', -OSiR' 3 or -PR' 2 radical, wherein R' is a halogen atom, a C 1 -C 10 alkyl group, or a C 6 -C 10 aryl group. R 2 and R 8 are not the same; R 4 and R 10 are substituted phenyl groups and are not the same; wherein R 4 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 C 1 to a C 10 alkyl groups or aryl groups and combinations thereof, wherein, when R 4 is a phenyl group which is further substituted with an aryl group, the two groups bound together are optionally joined together directly or by linker groups, wherein the linker group is an alkyl, vinyl, phenyl, alkynyl, silyl, germyl, amine, ammonium, phosphine, phosphonium, ether, thioether, borane, borate, alane or aluminate groups; R 10 is 1) a phenyl group substituted at the 2' position with an aryl group; or 2) a phenyl group substituted at the 3' and 5' positions with C 1 to a C 10 alkyl groups or aryl groups and combinations thereof; M is a group transition 2, 3 or 4 metal; T is a bridging group, wherein T is represented by the formula R a 2 J, where J is C, Si, or Ge, and each R a is, independently, hydrogen, halogen, C 1 to C 20 hydrocarbyl or a C 1 to C 20 substituted hydrocarbyl, and two R a can form a cyclic structure including aromatic, partially saturated, or saturated cyclic or fused ring system.; each X is an anionic leaving group; each R 1, R 3, R 5, R 6, R 7, R 9, R 11, R 12, R 13, and R 14 is, independently, hydrogen, or a hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, silylcarbyl, substituted silylcarbyl, germylcarbyl, or substituted germylcarbyl substituents; R 2 is a substituted or unsubstituted C 3 -C 12 cycloaliphatic group or is a methylene substituted with a substituted or unsubstituted C 3 -C 12 cycloaliphatic group or an ethylene substituted with a substituted or unsubstituted C 3 -C 12 cycloaliphatic group, wherein the C 3 -C 12 cycloaliphatic group can be substituted at one or more positions with a C 1 -C 10 alkyl group; and R 8 is a halogen atom, a C 1 -C 10 alkyl group which is optionally halogenated, a C 6 -C 10 aryl group which is optionally halogenated, a C 2 -C 10 alkenyl group, a C 7 -C 40 -arylalkyl group, a C 7 -C 40 alkylaryl group, a C 8 -C 40 arylalkenyl group, a -NR' 2, -SR', -OR', -OSiR' 3 or -PR' 2 radical, wherein R' is a halogen atom, a C 1 -C 10 alkyl group, or a C 6 -C 10 aryl group.