Monoamide based catalyst compositions for the polymerization of olefins

A catalyst precursor composition selected from the group consisting of those represented by:

• wherein T is a bridging group containing 2 or more bridging atoms;
• M is zirconium;
• Z is a coordination ligand;
• each L is a monovalent, bivalent, or trivalent anionic ligand;
• n is an integer from 1 to 6;
• m is an integer from 1 to 3;
• k has the value of 2 when X is nitrogen or phosphorus, and k has the value of 1 when X is oxygen or sulfur;
• X and Y are heteroatoms each independently selected from nitrogen, phosphorus, oxygen or sulfur;
• R is a non-bulky substituent selected from straight and branched chain alkyl groups, provided that when R is a branched or chained alkyl group, the branch point is at least 3 atoms removed from X;
• and
• R′ is a bulky substituent selected from alkyl, alkenyl, cycloalkyl, alkylaryl, arylalkyl, polymeric groups and heteroatom containing groups thereof;
• wherein there is branching within three atoms of Y and wherein R′ comprises from 3 to 50 non-hydrogen atoms.