A bridged metallocene compound of formula wherein: M is an atom of a transition metal selected from those belonging to group 3, 4, or to the lanthanide or actinide groups in the Periodic Table of the Elements; X, equal to or different from each other, is a hydrogen atom, a halogen atom, a R, OR, OSO 2 CF 3, OCOR, SR, NR 2 or PR 2 group wherein R is a linear or branched, cyclic or acyclic, C 1 -C 40 -alkyl, C 2 -C 40 alkenyl, C 2 -C 40 alkynyl, C 6 -C 40 -aryl, C 7 -C 40 -alkylaryl or C 7 -C 40 -arylalkyl radical; optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements; or two X groups can be joined together to form a group OR'O wherein R' is a C 1 -C 20 -alkylidene, C 6 -C 20 -arylidene, C 7 -C 20 -alkylarylidene, or C 7 -C 20 -arylalkylidene radical; L is a divalent bridging group selected from C 1 -C 20 alkylidene, C 3 -C 20 cycloalkylidene, C 6 -C 20 arylidene, C 7 -C 20 alkylarylidene, or a C 7 -C 20 arylalkylidene radicals, optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements, or it is a silylidene radical containing up to 5 silicon atoms; R 1 is a linear C 1 -C 40 hydrocarbon radical optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements; T 1 and T 4, equal to or different from each other, are an OR 2, a SR 2 group, wherein R 2, equal to or different from each other, is a C 1 -C 40 hydrocarbon radicals; T 2 and T 3, equal to or different from each other, are a C(R 19) 2 R 18 radical wherein R 18 is a linear or branched, C 1 -C 20 -alkyl radical and R 19 is a linear or branched, C 1 -C 20 -alkyl radical; R 4 is a hydrogen atom or C 1 -C 40 hydrocarbon radical optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements; W 1 and W 2, equal or different from each other, are an aromatic 5 or 6 membered ring that can contain heteroatoms belonging to groups 15-16 of the Periodic Table of the Elements; the valence of each atom of said ring is substituted with hydrogen atom or it can optionally be substituted with R 5 groups, wherein R 5, equal to or different from each other, are C 1 -C 40 hydrocarbon radicals optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements; M is an atom of a transition metal selected from those belonging to group 3, 4, or to the lanthanide or actinide groups in the Periodic Table of the Elements; X, equal to or different from each other, is a hydrogen atom, a halogen atom, a R, OR, OSO 2 CF 3, OCOR, SR, NR 2 or PR 2 group wherein R is a linear or branched, cyclic or acyclic, C 1 -C 40 -alkyl, C 2 -C 40 alkenyl, C 2 -C 40 alkynyl, C 6 -C 40 -aryl, C 7 -C 40 -alkylaryl or C 7 -C 40 -arylalkyl radical; optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements; or two X groups can be joined together to form a group OR'O wherein R' is a C 1 -C 20 -alkylidene, C 6 -C 20 -arylidene, C 7 -C 20 -alkylarylidene, or C 7 -C 20 -arylalkylidene radical; L is a divalent bridging group selected from C 1 -C 20 alkylidene, C 3 -C 20 cycloalkylidene, C 6 -C 20 arylidene, C 7 -C 20 alkylarylidene, or a C 7 -C 20 arylalkylidene radicals, optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements, or it is a silylidene radical containing up to 5 silicon atoms; R 1 is a linear C 1 -C 40 hydrocarbon radical optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements; T 1 and T 4, equal to or different from each other, are an OR 2, a SR 2 group, wherein R 2, equal to or different from each other, is a C 1 -C 40 hydrocarbon radicals; T 2 and T 3, equal to or different from each other, are a C(R 19) 2 R 18 radical wherein R 18 is a linear or branched, C 1 -C 20 -alkyl radical and R 19 is a linear or branched, C 1 -C 20 -alkyl radical; R 4 is a hydrogen atom or C 1 -C 40 hydrocarbon radical optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements; W 1 and W 2, equal or different from each other, are an aromatic 5 or 6 membered ring that can contain heteroatoms belonging to groups 15-16 of the Periodic Table of the Elements; the valence of each atom of said ring is substituted with hydrogen atom or it can optionally be substituted with R 5 groups, wherein R 5, equal to or different from each other, are C 1 -C 40 hydrocarbon radicals optionally containing heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements;