| abstract |
In the present invention, a metal complex, a catalyst composition comprising a metal complex, and a method for producing a metal complex and a catalyst composition are described with respect to the preparation of a polymer prepared from an addition polymerizable ethylenically unsaturated monomer. The metal complex has a chemical structure corresponding to formula Ia, formula Ib or formula VII.n n n Formula Ian n n n n n n n Formula Ibn n n n n n n n Formula VIIn n n n n n n n In the above formula (Ia), (Ib) and formula (VII),n n n M I and M II are metal,n n n T is nitrogen or phosphorus,n n n P is a carbon, nitrogen or phosphorus atom,n n n Groups R 1 , R 2 and R 3 may be bonded to one another,n n n Y is a divalent crosslinking group,n n n X, X 1 and X 2 are anionic ligand groups with certain exceptions,n n n D is a neutral Lewis base ligand,n n n s, o, k, i, ii, p, m, a, b, c, d, e, t and y are integers as further described in the claims. |