| abstract |
A bridged metallocene compound of formula (I) 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, OSO2CF3, OCOR, SR, NR2 or PR2 group; L is a divalent bridging group; R1 and R2, equal to each other, are C1-C40 h ydrocarbon radical; R3 is hydrogen o r a are C1-C40 hydrocarbon radical and W is an aromatic 5 or 6 membered ring. |