Patent ID: 7776980

Claim:
A monocyclopentadienyl complex comprising a structural element of general formula (IV) wherein: A is NR 2A ; R 1A -R 2A are each, independently of one another, hydrogen, a C 1 -C 22 -alkyl, a C 2 -C 22 -alkenyl, a C 6 -C 22 -aryl, an arylalkyl comprising from 1 to 10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, NR 3A 2 , N(SiR 3A 3 ) 2 , OR 3A , OSiR 3A 3 , or SiR 3A 3 , wherein R 1A -R 2A are optionally substituted by at least one halogen, and two R 1A -R 2A are optionally joined to form a five-, six- or seven-membered, nonaromatic ring; R 3A are each, independently of one another, hydrogen, a C 1 -C 20 -alkyl, a C 2 -C 20 -alkenyl, a C 6 -C 20 -aryl, or an arylalkyl comprising from 1 to 10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, wherein R 3A are optionally substituted by at least one halogen, and two R 3A are optionally joined to form a five- or six-membered ring; R 4A -R 7A are each, independently of one another, hydrogen, a C 1 -C 22 -alkyl, a C 2 -C 22 -alkenyl, a C 6 -C 22 -aryl, an arylalkyl comprising from 1 to 10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, NR 8A 2 , N(SiR 8A 3 ) 2 , OR 8A , OSiR 8A 3 , SiR 8A 3 , or BR 8A 2 , wherein R 4A -R 7A are optionally substituted by at least one halogen, and two R 4A -R 7A are optionally joined to form a five-, six- or seven-membered ring, and/or two R 4A -R 7A are optionally joined to form a five-, six- or seven-membered heterocycle comprising at least one atom from the group consisting of N, P, O and S; R 8A are each, independently of one another, hydrogen, a C 1 -C 20 -alkyl, a C 2 -C 20 -alkenyl, a C 6 -C 20 -aryl, or an arylalkyl comprising from 1 to 10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, wherein R 8A are optionally substituted by at least one halogen, and two R 8A are optionally joined to form a five- or six-membered ring; R 9A -R 12A are each, independently of one another, hydrogen, a C 1 -C 20 -alkyl, a C 2 -C 20 -alkenyl, a C 6 -C 20 -aryl, an arylalkyl comprising from 1 to 10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, or SiR 15A 3 , wherein R 9A -R 12A are optionally substituted by at least one halogen, and two R 9A -R 12A are optionally joined to form a five- or six-membered, nonaromatic ring; and R 15A are each, independently of one another, hydrogen, a C 1 -C 20 -alkyl, a C 2 -C 20 -alkenyl, a C 6 -C 20 -aryl, an arylalkyl comprising from 1 to 10 carbon atoms in the alkyl radical and 6-20 carbon atoms in the aryl radical, a C 1 -C 10 alkoxy or a C 6 -C 10 aryloxy, and two R 15A are optionally joined to form a five- or six-membered ring; and M A is a metal selected from the group consisting of titanium in an oxidation state 3, vanadium, chromium, molybdenum and tungsten.