Patent ID: 7803887

Claim:
A bridged metallocene compound of formula (I) wherein: M is an atom of a transition metal selected from group 4 or the actinide group in the Periodic Table of Elements; X, equal to or different from each other, is hydrogen, a halogen, R, OR, OSO 2 CF 3 , OCOR, SR, NR 2 , or PR 2 , or two X groups can be joined to form OR′O; 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, optionally comprising at least one heteroatom belonging to groups 13-17 of the Periodic Table of Elements; 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 a C 1 -C 20 alkylidene, a C 3 -C 20 cycloalkylidene, a C 6 -C 20 arylidene, a C 7 -C 20 alkylarylidene, or a C 7 -C 20 arylalkylidene, optionally comprising at least one heteroatom belonging to groups 13-17 of the Periodic Table of Elements, or L is a silylidene radical comprising up to 5 silicon atoms; R 1 is a linear C 1 -C 40 hydrocarbon, optionally comprising at least one heteroatom belonging to groups 13-17 of the Periodic Table of Elements; T 1 and T 2 , equal to or different from each other, are oxygen, sulfur, or C(R 18 ) 2 , with the proviso that at least one of T 1 and T 2 is oxygen or sulfur; R 18 , equal to or different from each other, are hydrogen or a C 1 -C 40 hydrocarbon, optionally comprising at least one heteroatom belonging to groups 13-17 of the Periodic Table of Elements; n is 1, 2 or 3; T 3 and T 4 , equal to or different from each other, are oxygen, sulfur, or C(R 18 ) 2 ; R 4 is hydrogen, or a C 1 -C 40 hydrocarbon optionally comprising at least one heteroatom belonging to groups 13-17 of the Periodic Table of Elements; W is an aromatic 5 or 6 membered ring optionally comprising at least one heteroatom belonging to groups 15-16 of the Periodic Table of Elements, wherein the valence of each atom of said 5 or 6 membered ring is substituted with hydrogen, or is optionally substituted with at least one R 5 ; and R 5 , equal to or different from each other, is a C 1 -C 40 hydrocarbon, optionally comprising at least one heteroatom belonging to groups 13-17 of the Periodic Table of Elements.