| abstract |
Mixed bis-imine pyridine ligands of formula (I), wherein Z1, which is different from Z2, is an optionally substituted aryl group; and Z2 comprises an optionally substituted heterohydrocarbyl moiety, or an optionally substituted aryl group in combination with a metal, said optionally substituted aryl group being .pi.-co-ordinated to the metal; Formula (I); mixed bis-imine pyridine MXn complexes comprising a ligand of formula (I), wherein M is a metal atom selected from Fe or Co, n is 2 or 3, and X is halide, optionally substituted hydrocarbyl, alkoxide, amide, or hydride; mixed [bis-imine pyridine MYp.Ln+] [NC-]q complexes comprising a ligand of formula (I), wherein Y is a ligand which may insert an olefin, M is a metal atom selected from Fe or Co, NC- is a non-coordinating anion and p+q is 2 or 3, matching the formal oxidation state of said metal atom; L is a neutral Lewis donor molecule; and n = 0, 1, or 2; and processes for the production of alpha olefins from ethylene, using said complexes. |