Transition metal compound containing cationic groups which is used as an olefin polymerization catalyst component

A compound of the formula (I)

• where
• M1 is a transition metal of group 4 of the Periodic Table of the Elements,
• R1 and R2 are identical or different and are each a hydrogen atom, a halogen atom or a C1-C20 group,
• R3 are identical or different and are each a hydrogen atom, a halogen atom or a C1-C40 group, and two radicals R3 may form a monocyclic or polycyclic ring system which may in turn be substituted, where at least one of the radicals R3 comprises a cationic group (—DEL)+Y−
• where
• D is an atom of group 15 or 16 of the Periodic Table of the Elements,
• E are identical or different and are each a hydrogen atom or a C1-C20 group, and two radicals E may form a monocyclic or polycyclic ring system which may in turn be substituted,
• L is 3 when D is an atom of group 15 of the Periodic Table of the Elements and is 2 when D is an atom of group 16 of the Periodic Table of the Elements,
• Y is halogen C1-C10-alkylsulfonate, C1-C10-haloalkylsulfonate, C6-C20-alkylsulfonate, C6-C20-haloarylsulfonate, C1-C20-alkylarylsulfonate, C1-C20-haloalkylcarboxylate, C1-C10-alkyl sulfate, tetrafluoroborate, hexafluorophosphate, hexafluoroantimonate or hexafluoroarsenate,
• m is an integer less than or equal to 4 and greater than or equal to 1,
• m′ is an integer smaller than or equal to 4 and greater than or equal to 1,
• k is zero or 1, where the metallocene is unbridged when k=0 and is bridged when k=1,
• A is a bridge of the formula
• or ═BR4, AIR4, —S—, —SO—, —SO2—, ═NR4, ═PR4, ═P(O)R4, o-phenylene, 2,2′-biphenylene, where
• M2 is Carbon, silicon, germanium, tin, nitrogen or phosphorus,
• o is 1, 2, 3 or 4,
• R4 and R5 are identical or different and are each a hydrogen atom, halogen or a C1-C20 group, and R4 and R5 may form a monocyclic or polycyclic ring system.