Patent ID: 8173828

Claim:
A metallocene compound represented by the formula (4): wherein M is a Group 3, 4, 5 or 6 transition metal atom, or a lanthanide metal atom, or actinide metal atom; A is a substituted monocyclic or polycyclic ligand that is pi-bonded to M and is substituted with at least one halogen substituent directly bonded to any sp 2 carbon atom at a bondable ring position of the ligand, wherein A includes one or more ring heteroatoms selected from boron, a Group 14 atom that is not carbon, a Group 15 atom, or a Group 16 atom; Y is an optional bridging group that is bonded to A and T, and is present when y is one and absent when y is zero; y is zero or one; and T is a heteroatom with a coordination number of three from Group 15 or with a coordination number of two from Group 16 of the Periodic Table of Elements; R″ is selected from a C 3 -C 100 substituted or unsubstituted monocyclic or polycyclic ring structure substituent that is partially unsaturated, unsaturated or aromatic; or a C 2 -C 100 substituted or unsubstituted, unsaturated or partially unsaturated, linear or branched alicyclic hydrocarbyl substituent; or a C 1 -C 100 substituted or unsubstituted saturated hydrocarbyl radical; t is the coordination number of the heteroatom T where “t−1−y” indicates the number of R″ substituents bonded to T; and each X is a univalent anionic ligand, or two X are joined and bound to the metal atom to form a metallocycle ring, or two X are joined to form a chelating ligand, a diene ligand, or an alkylidene ligand.