A catalyst represented by formula: wherein: each M is a group 4 metal, preferably hafnium or zirconium; E is C or N, preferably C; each of X 1, X 2, X 3, and X 4 is independently hydrogen, halogen, hydroxyl, -N(C 1 -C 40 hydrocarbyl) 2, C 4 -C 40 hydrocarbyl, or substituted C 4 -C 40 hydrocarbyl; each of R 1, R 2, and R 3 is independently hydrogen, halogen, C 1 -C 40 hydrocarbyl, substituted C 4 -C 40 hydrocarbyl, C 6 -C 10 aryl, substituted C 6 -C 10 aryl, -NR' 2, -SR', -OR', - OSiR' 3, or -PR' 2, wherein each R' is hydrogen, halogen, C 4 -C 40 alkyl, or C 6 -C 10 aryl or one or both of R 1 and R 2 or R 2 and R 3 are joined to form a saturated ring, unsaturated ring, substituted saturated ring, or substituted unsaturated ring; each of R 4, R 5, R 15, and R 16 is independently hydrogen or C 4 -C 40 hydrocarbyl; and each of R 6, R 7, R 8, R 9, R 10, R 11, R 12, R 13, R 14, R 17, R 18, R 19, R 20, R 21, R 22, R 23, R 24, and R 25 is independently hydrogen, halogen, C 1 -C 40 hydrocarbyl, substituted C 1 -C 40 hydrocarbyl, C 6 -C 10 aryl, substituted C 6 -C 10 aryl, -NR' 2, -SR', -OR', -OSiR' 3, or -PR' 2, wherein each R' is hydrogen, halogen, C 1 -C 10 alkyl, or C 6 -C 10 aryl, or one or more of R 6 and R 7, R 7 and R 8, R 8 and R 9, R 10 and R 11, R 11 and R 12, R 12 and R 13, R 13 and R 14, R 17 and R 18, R 18 and R 19, R 17 and R 20, R 21 and R 22, R 22 and R 23, R 23 and R 24, R 24 and R 25, and R 21 and R 25 are joined to form a saturated ring, unsaturated ring, substituted saturated ring, or substituted unsaturated ring; wherein if E is C, then one or more of R 6 and R 7, R 7 and R 8, R 8 and R 9, R 10 and R 11, R 11 and R 12, R 12 and R 13, R 13 and R 14, R 17 and R 18, R 18 and R 19, R 17 and R 20, R 21 and R 22, R 22 and R 23, R 23 and R 24, R 24 and R 25, and R 21 and R 25 are joined to form a saturated ring, unsaturated ring, substituted saturated ring, or substituted unsaturated ring. each M is a group 4 metal, preferably hafnium or zirconium; E is C or N, preferably C; each of X 1, X 2, X 3, and X 4 is independently hydrogen, halogen, hydroxyl, -N(C 1 -C 40 hydrocarbyl) 2, C 4 -C 40 hydrocarbyl, or substituted C 4 -C 40 hydrocarbyl; each of R 1, R 2, and R 3 is independently hydrogen, halogen, C 1 -C 40 hydrocarbyl, substituted C 4 -C 40 hydrocarbyl, C 6 -C 10 aryl, substituted C 6 -C 10 aryl, -NR' 2, -SR', -OR', - OSiR' 3, or -PR' 2, wherein each R' is hydrogen, halogen, C 4 -C 40 alkyl, or C 6 -C 10 aryl or one or both of R 1 and R 2 or R 2 and R 3 are joined to form a saturated ring, unsaturated ring, substituted saturated ring, or substituted unsaturated ring; each of R 4, R 5, R 15, and R 16 is independently hydrogen or C 4 -C 40 hydrocarbyl; and each of R 6, R 7, R 8, R 9, R 10, R 11, R 12, R 13, R 14, R 17, R 18, R 19, R 20, R 21, R 22, R 23, R 24, and R 25 is independently hydrogen, halogen, C 1 -C 40 hydrocarbyl, substituted C 1 -C 40 hydrocarbyl, C 6 -C 10 aryl, substituted C 6 -C 10 aryl, -NR' 2, -SR', -OR', -OSiR' 3, or -PR' 2, wherein each R' is hydrogen, halogen, C 1 -C 10 alkyl, or C 6 -C 10 aryl, or one or more of R 6 and R 7, R 7 and R 8, R 8 and R 9, R 10 and R 11, R 11 and R 12, R 12 and R 13, R 13 and R 14, R 17 and R 18, R 18 and R 19, R 17 and R 20, R 21 and R 22, R 22 and R 23, R 23 and R 24, R 24 and R 25, and R 21 and R 25 are joined to form a saturated ring, unsaturated ring, substituted saturated ring, or substituted unsaturated ring; wherein if E is C, then one or more of R 6 and R 7, R 7 and R 8, R 8 and R 9, R 10 and R 11, R 11 and R 12, R 12 and R 13, R 13 and R 14, R 17 and R 18, R 18 and R 19, R 17 and R 20, R 21 and R 22, R 22 and R 23, R 23 and R 24, R 24 and R 25, and R 21 and R 25 are joined to form a saturated ring, unsaturated ring, substituted saturated ring, or substituted unsaturated ring.