Di- and tri-heteroatom substituted indenyl metal complexes

A metal complexes corresponding to the formula:

• where M is a metal from Group 4 of the Periodic Table of the Elements which is in the +2, +3 or +4 formal oxidation state,
• RA independently each occurrence is hydrogen, RB or TRBj, with the proviso that in at least two but not more than three occurrences RA is TRBj,
• j is 1 or 2, and when j is 1, T is oxygen or sulfur and when j is 2, T is nitrogen or phosphorus,
• RB independently each occurrence is a group having from 1 to 80 atoms not counting hydrogen, which is hydrocarbyl, hydrocarbylsilyl, halo-substituted hydrocarbyl, hydrocarbyloxy-substituted hydrocarbyl, hydrocarbylamino-substituted hydrocarbyl, or hydrocarbylsilyl-substituted hydrocarbyl, or two RB groups are joined together forming a divalent ligand group;
• Z is a divalent moiety bound to the substituted indenyl group and bound to M by either covalent or coordinate covalent bonds, comprising boron or a member of Group 14 of the Periodic Table of the Elements, and also comprising nitrogen, phosphorus, sulfur or oxygen;
• X is an anionic or dianionic ligand group having up to 60 atoms including ligands that are cyclic, delocalized, π-bound ligand groups;
• X′ independently each occurrence is a Lewis base ligand having up to 20 atoms;
• p is a number from 0 to 5, when each X is an anionic ligand, p is two less than the formal oxidation state of M, when some or all X groups are dianionic ligand groups each dianionic X group accounts for two valencies and p is correspondingly reduced in value;
• and
• q is zero, 1 or 2.