US 7,538,168 B2
	Halogen substituted metallocene compounds for olefin polymerization
Alexander Z. Voskoboynikov, Moscow (Russian Federation); Alexey N. Ryabov, Moscow (Russian Federation); Mikhail V. Nikulin, Moscow (Russian Federation); Alexander V. Lygin, Moscow (Russian Federation); Vyatcheslav V. Izmer, Moscow (Russian Federation); Andrey F. Asachenko, Chelyabinsk (Russian Federation); Catalina L. Coker, Baytown, Tex. (US); and Jo Ann M. Canich, Houston, Tex. (US)
Assigned to ExxonMobil Chemical Patents Inc., Houston, Tex. (US)
Filed on Dec. 14, 2005, as Appl. No. 11/300,002.
Prior Publication US 2007/0135593 A1, Jun. 14, 2007
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 4/64 (2006.01); C08F 4/72 (2006.01); C07F 17/00 (2006.01)

U.S. Cl. 526—170  [526/160; 526/943; 526/941; 526/348; 502/103; 556/53]

81 Claims

1. A metallocene compound comprising a transition metal and at least one substituted polycyclic arene ligand bonded to the transition metal, wherein said arene ligand comprises at least one bromo or iodo substituent directly bonded to an sp2 carbon atom at a bondable ring position of an aromatic five-membered ring of said arene ligand, where the transition metal is a Group 3, 4 or 6 metal atom or a lanthanide metal atom or an actinide metal atom, wherein said arene ligand is an indenyl ligand having least one bromo or iodo substituent directly bonded to an sp2 carbon atom at the one or three position of the indenyl ligand.