Patent ID: 7629464

Claim:
The monocyclopentadienyl complex comprising formula Cp-Z-A-M A (II), where: Cp-Z-A is where: E 1A -E 5A are each carbon; R 1A -R 4A 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 part and 6-20 carbon atoms in the aryl part, or SiR 5A 3 , where R 1A -R 4A optionally can be substituted by at least one halogen and two vicinal R 1A -R 4A optionally can be joined to form a five-, six- or seven-membered ring; R 5A 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 part and 6-20 carbon atoms in the aryl part, or two geminal R 5A optionally can be joined to form a five- or six-membered ring; Z is a divalent bridge between A and Cp and is where L 1A is carbon, silicon or germanium; D 1A is an atom of group 15 or 16 of the Periodic Table of Elements; n is 0 when D 1A is an atom of group 16, and is 1 when D 1A is an atom of group 15; R 6A -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, an arylalkyl comprising from 1 to 10 carbon atoms in the alkyl part and 6-20 carbon atoms in the aryl part, or SiR 9A 3 , where R 6A -R 8A optionally can be substituted by at least one halogen and two geminal or vicinal R 6A -R 8A optionally can be joined to form a five- or six-membered ring; R 9A 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 part and 6-20 carbon atoms in the aryl part, a C 1 -C 10 -alkoxy or a C 6 -C 10 -aryloxy, or two R 9A optionally can be joined to form a five- or six-membered ring; A comprises formula (IV): where E 6A -E 9A are each, independently of one another, carbon, or nitrogen; R 13A -R 16A 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 part and 6-20 carbon atoms in the aryl part, or SiR 17A 3 , where R 13A -R 16A optionally can be substituted by at least one halogen or nitrogen, or two vicinal R 13A -R 16A or R 13A and Z optionally can be joined to form a five- or six-membered ring; R 17A 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 part and 6-20 carbon atoms in the aryl part, or two R 17A optionally can be joined to form a five- or six-membered ring; p is 0 when E 6A -E 9A is nitrogen, and is 1 when E 6A -E 9A is carbon; and M A is chromium, molybdenum, or tungsten.