Patent ID: 7244805

Claim:
A bimetallic zinc complex having formula 1: wherein each of N˜N chelate ligands is a monovalent anion and together with zinc forms a 6-membered ring, R1 is a C 1 -C 20 alkyl radical having at least one hydrogen atom unsubstituted or substituted by a halogen atom or a C 6 -C 20 aryl radical having at least one hydrogen atom unsubstituted or substituted by a halogen atom, and the R1 radicals are either identical or different from each other, R2 is a hydrogen atom, a halogen atom, a cyanide radical, or a C 1 -C 20 alkyl radical having at least one hydrogen atom unsubstituted or substituted by a halogen atom, or a C 6 -C 20 aryl radical having at least one hydrogen atom unsubstituted or substituted by a halogen atom, and the R2 radicals are either identical or different from each other, R3 is a hydrogen atom, a halogen atom, a cyanide radical, or a C 1 -C 20 alkyl radical having at least one hydrogen atom unsubstituted or substituted by a halogen atom, or a C 6 -C 20 aryl radical having at least one hydrogen atom unsubstituted or substituted by a halogen atom, and the R3 radicals are either identical or different from each other, R4 is a hydrogen atom, a halogen atom, a cyanide radical, or a C 1 -C 20 alkyl radical having at least one hydrogen atom unsubstituted or substituted by a halogen atom, or a C 6 -C 20 aryl radical having at least one hydrogen atom unsubstituted or substituted by a halogen atom, and the R4 radicals are either identical or different from each other, either R2 and R3, or R3 and R4 may be linked to each other to form a ring, X is a monovalent anion selected from a C 1 -C 20 alkoxy radical having at least one hydrogen atom unsubstituted or substituted by a halogen atom, carboxy, alkylsulfinato, and amido, and the X monovalent anions are either identical or different from each other and each X may be coordinated to only a metallic zinc atom or form a bridged structure between two metallic zinc atoms, Y is a carbon diradical and may have at least one hydrogen substituted by halogen, and the Y diradicals are either identical or different from each other, and Q is a C 1 -C 20 alkyl diradical having at least one hydrogen atom unsubstituted or substituted by a halogen atom or a C 6 -C 20 aryl diradical having at least one hydrogen atom unsubstituted or substituted by a halogen atom.