Patent ID: 6153776
Filing Date: 2000-11-28
Classification: C07F,C08F,Y10S

Abstract:
A bimetallic complex corresponding to the formula: ##STR15## wherein: M and M' are independently Group 3, 4, 5, 6, or Lanthanide metals;L is a divalent group (or trivalent group if bound to Q) having up to 50 nonhydrogen atoms and containing an aromatic .pi.-system through which the group is bound to M, said L also being bound to Z;L' is a monovalent group or a divalent group (if bound to L' or Q), or a trivalent group if bound to both L' and Q) having up to 50 nonhydrogen atoms and containing an aromatic c-system through which the group is bound to M';L"" is a monovalent group or a divalent group (if bound to L' or Q), or a trivalent group if bound to both L' and Q) having up to 50 nonhydrogen atoms and containing an aromatic .pi.-system through which the group is bound to M', or L"" is a moiety comprising boron or a member of Group 14 of the Periodic Table of the Elements, and optionally also comprising nitrogen, phosphorus, sulfur or oxygen, said L' having up to 20 non-hydrogen atoms;Z is a moiety comprising boron or a member of Group 14 of the Periodic Table of the Elements, and optionally also comprising nitrogen, phosphorus, sulfur or oxygen, said Z having up to 20 non-hydrogen atoms;X and X' independently each occurrence are anionic ligand groups having up to 40 atoms exclusive of the class of ligands containing an aromatic .pi.-system through which the group is bound to M or M', or optionally two X groups or two X' groups together form a C.sub.4-40 conjugated or nonconjugated diene optionally substituted with one or more hydrocarbyl, silyl, halocarbyl, or halohydrocarbyl groups;X"" independently each occurrence is a neutral ligating compound having up to 20 atoms;Q is a divalent anionic ligand group bound at one terminus to either Z or L and bound at the remaining terminus to either L' or L"", said Q having up to 20 nonhydrogen atoms;x and x' are independently integers from 0 to 3, selected to provide charge balance; andx"" is a number from 0 to 3.