Patent ID: 7514586

Claim:
A Zn-ligand complex having the following chemical structure (I): wherein Y is O or NR 7 ; R 2 and R 3 independently are H, halogen, C 1-8 alkyl, halo-C 1-8 alkyl, aryl or halo-aryl; R 4 , R 5 and R 7 independently are C 1-8 alkyl, halo-C 1-8 alkyl, aryl or halo-aryl; and R 6 is H, halogen, C 1-8 alkyl or halo-C 1-8 alkyl; and R 1 is halogen, C 1-8 alkyl, halo-C 1-8 alkyl, aryl or halo-aryl.