3-heteroatom substituted cyclopentadienyl-containing metal complexes and olefin polymerization process

A metal complex corresponding to the formula:

• wherein
• M is Ti, Zr, or Hf;
• j is 1 or 2;
• when j is 1, T is O or S, when j is 2, T is N or P;
• RB is independently a group having from 1 to 80 nonhydrogen atoms which is hydrocarbyl, hydrocarbylsilyl, halo-substituted hydrocarbyl, hydrocarbyloxy-substituted hydrocarbyl, hydrocarbylamino-substituted hydrocarbyl, or hydrocarbylsilylhydrocarbyl, each RB optionally being substituted with one or more groups which are independently hydrocarbyloxy, hydrocarbylsiloxy, hydrocarbylsilylamino, di(hydrocarbylsilyl)amino, hydrocarbylamino, di(hydrocarbyl)amino, di(hydrocarbyl)phosphino, or hydrocarbylsulfido, having from 1 to 20 nonhydrogen atoms;
• or, optionally, two RB are covalently linked with each other to form one or more fused rings or ring systems;
• RA, RW, RX, RY and RZ are independently hydrogen, or a group having from 1 to 80 nonhydrogen atoms which is hydrocarbyl, halo-substituted hydrocarbyl, hydrocarbyloxy-substituted hydrocarbyl, hydrocarbylamino-substituted hydrocarbyl, hydrocarbylsilyl, or hydrocarbylsilylhydrocarbyl, or, optionally, two or more of RW, RX, RY, RZ, RA and RB are covalently linked with each other to form one or more fused rings or ring systems;
• Z is a divalent moiety bound to both Cp and M via σ-bonds, where Z comprises boron, or a member of Group 14 of the Periodic Table of the Elements, and also comprises nitrogen, phosphorus, sulfur or oxygen;
• X is an anionic or dianionic ligand group having up to 60 atoms exclusive of the class of ligands that are cyclic, delocalized, π-bound ligand groups;
• X′ independently each occurrence is a neutral Lewis base ligating compound having up to 20 atoms;
• p is zero, 1 or 2, and is two less than the formal oxidation state of M, when X is an anionic ligand;
• when X is a dianionic ligand group, p is 1;
• and
• q is zero, 1 or 2.