Metallocene compound of general formula: wherein: M is a metal selected from the group consisting of titanium, zirconium and hafnium; X 1 and X 2, which can be the same or different, are a halogen atom, a R', OR', OCOR', SR', NR' 2 or PR' 2 group, wherein the R' substituents are linear or branched, saturated or unsaturated C 1 -C 20 alkyl, C 3 -C 20 cycloalkyl, C 6 -C 20 aryl, C 7 -C 20 alkylaryl, C 7 -C 20 arylalkyl radicals, optionally containing one or more heteroatoms belonging to the groups 13-17 of the Periodic Table of the Elements; X 1 and X 2 can also be interconnected via a cyclic structure of < 40 atoms comprising one or more of C, N, O, F, Si, B, P; R 1, R 2, R 3, R 4, R 5, R 6, R 7, R 8 and R 9, the same or different, are H or linear or branched, saturated or unsaturated C 1 -C 20 alkyl, C 3 -C 20 cycloalkyl, C 6 -C 20 aryl, C 7 -C 20 alkylaryl, C 7 -C 20 arylalkyl radicals, optionally containing one or more heteroatoms belonging to the groups 13-17 of the Periodic Table of the Elements; two or more adjacent R 1, R 2, R 3, R 4, R 5, R 6, R 7, R 8 and R 9 groups on a cyclopentadienyl residue may be connected by a saturated or unsaturated bridge containing up to 40 atoms comprising one or more of C, N, S, O, F, Si, B, P, said bridge optionally containing or being part of up to 5 carbo- or hetero-cycles. L is a linker having a functional end, selected from the group consisting of: wherein: Ph=phenyl; X=R'NH, in which R' is as defined above; R is selected from the group consisting of F, CH 2 F, CHF 2, CF 3, OCF 3; Ar is C 6 -C 20 aryl, C 7 -C 20 alkylaryl, or C 7 -C 20 arylalkyl radical, optionally containing one or more heteroatoms belonging to the groups 13-17 of the Periodic Table of the Elements m = 2-20. M is a metal selected from the group consisting of titanium, zirconium and hafnium; X 1 and X 2, which can be the same or different, are a halogen atom, a R', OR', OCOR', SR', NR' 2 or PR' 2 group, wherein the R' substituents are linear or branched, saturated or unsaturated C 1 -C 20 alkyl, C 3 -C 20 cycloalkyl, C 6 -C 20 aryl, C 7 -C 20 alkylaryl, C 7 -C 20 arylalkyl radicals, optionally containing one or more heteroatoms belonging to the groups 13-17 of the Periodic Table of the Elements; X 1 and X 2 can also be interconnected via a cyclic structure of < 40 atoms comprising one or more of C, N, O, F, Si, B, P; R 1, R 2, R 3, R 4, R 5, R 6, R 7, R 8 and R 9, the same or different, are H or linear or branched, saturated or unsaturated C 1 -C 20 alkyl, C 3 -C 20 cycloalkyl, C 6 -C 20 aryl, C 7 -C 20 alkylaryl, C 7 -C 20 arylalkyl radicals, optionally containing one or more heteroatoms belonging to the groups 13-17 of the Periodic Table of the Elements; two or more adjacent R 1, R 2, R 3, R 4, R 5, R 6, R 7, R 8 and R 9 groups on a cyclopentadienyl residue may be connected by a saturated or unsaturated bridge containing up to 40 atoms comprising one or more of C, N, S, O, F, Si, B, P, said bridge optionally containing or being part of up to 5 carbo- or hetero-cycles. L is a linker having a functional end, selected from the group consisting of: Ph=phenyl; X=R'NH, in which R' is as defined above; R is selected from the group consisting of F, CH 2 F, CHF 2, CF 3, OCF 3; Ar is C 6 -C 20 aryl, C 7 -C 20 alkylaryl, or C 7 -C 20 arylalkyl radical, optionally containing one or more heteroatoms belonging to the groups 13-17 of the Periodic Table of the Elements m = 2-20.