A catalyst compound represented by formula: wherein: M is a group 4 metal, preferably Zr, Ti or Hf; Y 1 and Y 2 are independently Si, Ge, or C, where at least one of Y 1 and Y 2 is not C, preferably at least one of Y 1 and Y 2 is Si, more preferably Y 1 and Y 2 are Si; X 1 and X 2 are independently hydrogen, halide, hydroxyl, or C 1 -C 50 substituted or unsubstituted hydrocarbyl, amide, alkoxide, sulfide, phosphide, or combination thereof, or X 1 and X 2 are joined together to form a metallocycle ring, or X 1 and X 2 are joined to form a chelating ligand, or an alkylidene; each of R 1, R 2, R 3, R 5, R 6, R 2, R 9, R 10, R 11, R 12, R 13, and R 14 is independently hydrogen, halogen, C 4 -C 50 hydrocarbyl or C 4 -C 50 substituted hydrocarbyl, halocarbyl, silylcarbyl, alkoxyl, siloxyl, or one or more of R 1 and R 2, R 2 and R 3 and R 5 and R 6, are joined to form a saturated cyclic ring, substituted saturated cyclic ring, a substituted unsaturated cyclic ring, or an unsubstituted unsaturated cyclic ring; R 4 is halogen, silylcarbyl, substituted silylcarbyl, C 1 -C 40 hydrocarbyl, substituted C 1 -C 40 hydrocarbyl, C 6 -C 10 aryl, substituted C 6 -C 10 aryl, fluorenylidenyl, substituted fluorenylidenyl, or -NR' 2, -SR', -OR', -OSiR' 3, -PR' 2, where each R' is hydrogen, halogen, C 1 -C 40 alkyl, or C 6 -C 10 aryl, or R 3 and R 4, are joined to form a saturated cyclic ring, substituted saturated cyclic ring, a substituted unsaturated cyclic ring, or an unsubstituted unsaturated cyclic ring, or R 4 is hydrogen and R 2 and R 3 are joined to form a saturated cyclic ring, substituted saturated cyclic ring, or an unsubstituted unsaturated cyclic ring; and R 8 is hydrogen, halogen, C 1 -C 40 hydrocarbyl, substituted C 1 -C 40 hydrocarbyl, silylcarbyl, silyl, substituted silylcarbyl, C 6 -C 10 aryl, substituted C 6 -C 10 aryl, -NR' 2, -SR', - OR', -OSiR' 3, -PR' 2, where each R' is hydrogen, halogen, C 1 -C 10 alkyl, or phenyl. M is a group 4 metal, preferably Zr, Ti or Hf; Y 1 and Y 2 are independently Si, Ge, or C, where at least one of Y 1 and Y 2 is not C, preferably at least one of Y 1 and Y 2 is Si, more preferably Y 1 and Y 2 are Si; X 1 and X 2 are independently hydrogen, halide, hydroxyl, or C 1 -C 50 substituted or unsubstituted hydrocarbyl, amide, alkoxide, sulfide, phosphide, or combination thereof, or X 1 and X 2 are joined together to form a metallocycle ring, or X 1 and X 2 are joined to form a chelating ligand, or an alkylidene; each of R 1, R 2, R 3, R 5, R 6, R 2, R 9, R 10, R 11, R 12, R 13, and R 14 is independently hydrogen, halogen, C 4 -C 50 hydrocarbyl or C 4 -C 50 substituted hydrocarbyl, halocarbyl, silylcarbyl, alkoxyl, siloxyl, or one or more of R 1 and R 2, R 2 and R 3 and R 5 and R 6, are joined to form a saturated cyclic ring, substituted saturated cyclic ring, a substituted unsaturated cyclic ring, or an unsubstituted unsaturated cyclic ring; R 4 is halogen, silylcarbyl, substituted silylcarbyl, C 1 -C 40 hydrocarbyl, substituted C 1 -C 40 hydrocarbyl, C 6 -C 10 aryl, substituted C 6 -C 10 aryl, fluorenylidenyl, substituted fluorenylidenyl, or -NR' 2, -SR', -OR', -OSiR' 3, -PR' 2, where each R' is hydrogen, halogen, C 1 -C 40 alkyl, or C 6 -C 10 aryl, or R 3 and R 4, are joined to form a saturated cyclic ring, substituted saturated cyclic ring, a substituted unsaturated cyclic ring, or an unsubstituted unsaturated cyclic ring, or R 4 is hydrogen and R 2 and R 3 are joined to form a saturated cyclic ring, substituted saturated cyclic ring, or an unsubstituted unsaturated cyclic ring; and R 8 is hydrogen, halogen, C 1 -C 40 hydrocarbyl, substituted C 1 -C 40 hydrocarbyl, silylcarbyl, silyl, substituted silylcarbyl, C 6 -C 10 aryl, substituted C 6 -C 10 aryl, -NR' 2, -SR', - OR', -OSiR' 3, -PR' 2, where each R' is hydrogen, halogen, C 1 -C 10 alkyl, or phenyl.