Patent ID: 6838563

Claim:
A substituted monocyclopentadienyl, monoindenyl mono-fluorenyl or heterocyclopentadienyl complex of formula I [Y—M—X n ] m I, where: M is chromium, molybdenum or tungsten, Y is described by formula II where: E 1 -E 5 are carbon or a maximum of one E 1 to E 5 is phosphorus or nitrogen, Z is a ring system represented by formulae wherein R 18 -R 27 independently of one another are hydrogen, C 1 -C 20 -alkyl, C 2 -C 20 -alkenyl, C 6 -C 20 -aryl, alkylaryl having 1 to 10 carbon atoms in the alkyl radical and 6 to 20 carbon atoms in the aryl radical, SiR 17 3 , or halogens, where the organic radicals R 18 -R 27 may also be substituted by halogens, and in each case two geminal or vicinal radicals R 18 -R 27 may also be linked to form a five- or six-membered ring, B is one of the following groups: and in addition, if Z is an unsubstituted, substituted or fused, partially unsaturated heterocyclic or heteroaromatic ring system, may alternatively be where L 1 and L 2 are silicon or carbon, k is 1, and is alternatively 0 if Z is an unsubstituted, substituted or fused, partially unsaturated heterocyclic or heteroaromatic ring system, X independently of one another, are fluorine, chlorine, bromine, iodine, hydrogen, C 1 -C 10 -alkyl, C 2 -C 10 -alkenyl, C 6 -C 20 -aryl, alkylaryl having 1-10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, NR 15 R 16 , OR 15 , SR 15 , SO 3 R 15 , OC(O)R 15 , CN, SCN, β-diketonate, CO, BF 4 —, PF 6 —, or a bulky, non-coordinating anion, R 1 -R 16 independently of one another, are hydrogen, C 1 -C 20 -alkyl, C 2 -C 20 -alkenyl, C 6 -C 20 -aryl, alkylaryl having 1 to 10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, or SiR 17 3 , where the organic radicals R 1 -R 16 may also be substituted by halogens, and in each case two geminal or vicinal radicals R 1 -R 16 may also be linked to form a five- or six-membered ring, R 17 independently of one another, are hydrogen, C 1 -C 20 -alkyl, C 2 -C 20 -alkenyl, C 6 -C 20 -aryl, alkylaryl having 1 to 10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, and in each case two geminal radicals R 17 may also be linked to form a five- or six-membered ring, n is 1, 2 or 3, and m is 1, 2 or 3.