Patent ID: 8877881

Claim:
A process for polymerization comprising contacting ethylene and optionally one or more unsaturated monomers with an activator comprising a non-coordinating anion and a catalyst compound represented by the structure: wherein M is a Group 4 transition metal; N is nitrogen; O is oxygen; each X is, independently, selected from the group consisting of fluoride, chloride, bromide, iodide, methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, heneicosyl, docosyl, tricosyl, tetracosyl, pentacosyl, hexacosyl, heptacosyl, octacosyl, nonacosyl, triacontyl, hydride, phenyl, benzyl, phenethyl, tolyl, trimethylsilylmethyl, bis(trimethylsilyl)methyl, methoxy, ethoxy, propoxy, butoxy, dimethylamido, diethylamido, methylethylamido, phenoxy, benzoxy, and allyl; w is 1, 2, or 3; each R 1 and R 2 is, independently, a hydrogen, a hydrocarbyl, a substituted hydrocarbyl, a halocarbyl, or a substituted halocarbyl, a halogen, an alkoxide, a sulfide, an amide, a phosphide, or a silyl; or independently, may join together to form a C 4 to C 62 cyclic or polycyclic ring structure; n is 2 or 3 such that w+n=4; additionally in the case where n>1, the ligands (defined to be the organic fragment containing R 1 , R 2 , N, and O) may be linked together to form a potentially tetradentate, dianionic ligand; L is a neutral ligand bonded to M; and m is 0, 1, or 2 and indicates the absence or presence of L, provided that when R 2 is t-butyl, then R 1 is not 2,6-dimethyl phenyl and X is not Cl.