A process to polymerize olefins comprising: 1) contacting olefin monomers with a catalyst system comprising an activator and a bis-cyclopentadienyl metallocene compound represented by the formula: wherein: M is Hf; each X 1 and X 2 is, independently, a hydrocarbyl radical having from 1 to 20 carbon atoms, hydride, amide, alkoxide, sulfide, phosphide, halide, diene, amine, phosphine, ether, or X 1 and X 2 optionally form a part of a fused ring or a ring system; each of R 1, R 2, R 3, R 4, R 6, R 7, R 8, and R 9 is, independently, hydrogen, halide, alkoxide or a C 1 to C 40 substituted or unsubstituted hydrocarbyl group, provided that at least one of R 6, R 7, R 8, and R 9 and at least one of R 1, R 2, R 3, R 4, is a linear C 3 to C 20 substituted or unsubstituted hydrocarbyl group; T is a group 14 atom; each R a and R b is, independently, a C 1 to C 40 substituted or unsubstituted hydrocarbyl; and wherein the bis-cyclopentadienyl metallocene compound generates hydrogen and the polymerization occurs in the presence of hydrogen, and wherein the olefin monomer comprises ethylene; 2) obtaining a polymer having: a) an internal unsaturation of 50 % or more; wherein unsaturation is determined by 1 H NMR, the percentage is determined by adding Vy1 + Vy2 + trisubstituted olefins then dividing by total unsaturation; b) a melt index of less than 20 g/10min, determined according to ASTM D1238, 190°C, 216 kg load); and c) a g'vis of 0.95 or more, calculated using the output of the SEC-DRI-LS-VIS method as described herein. 1) contacting olefin monomers with a catalyst system comprising an activator and a bis-cyclopentadienyl metallocene compound represented by the formula: wherein: M is Hf; each X 1 and X 2 is, independently, a hydrocarbyl radical having from 1 to 20 carbon atoms, hydride, amide, alkoxide, sulfide, phosphide, halide, diene, amine, phosphine, ether, or X 1 and X 2 optionally form a part of a fused ring or a ring system; each of R 1, R 2, R 3, R 4, R 6, R 7, R 8, and R 9 is, independently, hydrogen, halide, alkoxide or a C 1 to C 40 substituted or unsubstituted hydrocarbyl group, provided that at least one of R 6, R 7, R 8, and R 9 and at least one of R 1, R 2, R 3, R 4, is a linear C 3 to C 20 substituted or unsubstituted hydrocarbyl group; T is a group 14 atom; each R a and R b is, independently, a C 1 to C 40 substituted or unsubstituted hydrocarbyl; and wherein the bis-cyclopentadienyl metallocene compound generates hydrogen and the polymerization occurs in the presence of hydrogen, and wherein the olefin monomer comprises ethylene; M is Hf; each X 1 and X 2 is, independently, a hydrocarbyl radical having from 1 to 20 carbon atoms, hydride, amide, alkoxide, sulfide, phosphide, halide, diene, amine, phosphine, ether, or X 1 and X 2 optionally form a part of a fused ring or a ring system; each of R 1, R 2, R 3, R 4, R 6, R 7, R 8, and R 9 is, independently, hydrogen, halide, alkoxide or a C 1 to C 40 substituted or unsubstituted hydrocarbyl group, provided that at least one of R 6, R 7, R 8, and R 9 and at least one of R 1, R 2, R 3, R 4, is a linear C 3 to C 20 substituted or unsubstituted hydrocarbyl group; T is a group 14 atom; each R a and R b is, independently, a C 1 to C 40 substituted or unsubstituted hydrocarbyl; and wherein the bis-cyclopentadienyl metallocene compound generates hydrogen and the polymerization occurs in the presence of hydrogen, and wherein the olefin monomer comprises ethylene; 2) obtaining a polymer having: a) an internal unsaturation of 50 % or more; wherein unsaturation is determined by 1 H NMR, the percentage is determined by adding Vy1 + Vy2 + trisubstituted olefins then dividing by total unsaturation; b) a melt index of less than 20 g/10min, determined according to ASTM D1238, 190°C, 216 kg load); and c) a g'vis of 0.95 or more, calculated using the output of the SEC-DRI-LS-VIS method as described herein. a) an internal unsaturation of 50 % or more; wherein unsaturation is determined by 1 H NMR, the percentage is determined by adding Vy1 + Vy2 + trisubstituted olefins then dividing by total unsaturation; b) a melt index of less than 20 g/10min, determined according to ASTM D1238, 190°C, 216 kg load); and c) a g'vis of 0.95 or more, calculated using the output of the SEC-DRI-LS-VIS method as described herein.