Patent ID: 8247587

Claim:
A mono-hydroindacenyl complex comprising the structural features of the formula (II): Hydroindac-Y m M A X A n (II), where the variables have the following meanings: Hydroindac is a hydroindacenyl system having an arylalkyl substituent having from 1 to 10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, Y is a substituent which is bound to Hydroindac and comprises at least one uncharged donor containing at least one atom of group 15 or 16 of the Periodic Table, M A is titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum or tungsten or an element of group 3 of the Periodic Table and the lanthanides, m is 1, 2 or 3, radicals X A are each, independently of one another, fluorine, chlorine, bromine, iodine, hydrogen, C 1 -C 10 -alkyl, C 2 -C 10 -alkenyl, C 6 -C 20 -aryl, arylalkyl having 1-10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, NR 23A R 24A , OR 23A , SR 23A , SO 3 R 23A , OC(O)R 23A , CN, SCN, β-diketonate, CO, BF 4 − , PF 6 − or bulky noncoordinating anions or two radicals X A form a substituted or unsubstituted diene ligand, and the radicals X A may be joined to one another, R 23A -R 24A are each, independently of one another, hydrogen, C 1 -C 20 -alkyl, C 2 -C 20 -alkenyl, C 6 -C 20 -aryl, arylalkyl having from 1 to 10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, SiR 25A 3 , where the organic radicals R 23A -R 24A may also be substituted by halogens or nitrogen- and oxygen-containing groups and two radicals R 23A -R 24A may also be joined to form a five- or six-membered ring, the radicals R 25A are each, independently of one another, hydrogen, C 1 -C 20 -alkyl, C 2 -C 20 -alkenyl, C 6 -C 20 -aryl, arylalkyl having from 1 to 10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical and two radicals R 25A may also be joined to form a five- or six-membered ring, and n is 1, 2, or 3.