Monocyclopentadienyl complexes
View Patent ↗Monocyclopentadienyl complexes in which the cyclopentadienyl system is substituted by at least one bridged donor, where the bridge contains at least one atom of group 14 of the Periodic Table and at least one atom of group 15 or 16 of the Periodic Table, and a catalyst system comprising at least one of the monocyclopentadienyl complexes, and also methods of preparing them, the use of the catalyst system for the polymerization or copolymerization of olefins and a process for preparing polyolefins by polymerization or copolymerization of olefins in the presence of the catalyst system and the preparation of the associated cyclopentadienyl system.
1. 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.
2. The monocyclopentadienyl complex as claimed in claim 1 , wherein L 1A is silicon.
3. The monocyclopentadienyl complex as claimed in claim 1 , wherein D 1A is oxygen, sulfur, nitrogen, or phosphorus.
4. The monocyclopentadienyl complex as claimed in claim 1 , wherein -Z- is —SiR 6A R 7A —O—.
5. A catalyst system for olefin polymerization comprising:
A) at least one monocyclopentadienyl complex as claimed in claim 1 ;
B) optionally, an organic or inorganic support;
C) optionally, one or more activating compounds;
D) optionally, further catalysts suitable for olefin polymerization; and
E) optionally, one or more metal compounds comprising a metal of group 1, 2 or 13 of the Periodic Table of Elements.
6. A process for preparing polyolefins by polymerization or copolymerization olefins in presence of the catalyst system as claimed in claim 5 .