Patent ID: 8916712

Claim:
A zinc chelate compound comprising at least one Zn ion and at least one ligand comprising Formula (II): wherein: R 1′ and R 2′ are independently selected from the group consisting of hydrogen, hydrocarbyl, and substituted hydrocarbyl, or together R 1′ and R 2′ form a group selected from the group consisting of ═O, ═S, and a hydrocarbyl ring comprising from three to six members; and R 3′ and R 4′ are independently selected from the group consisting of hydrogen, alkyl other than propyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, or together R 3′ and R 4′ form a group selected from the group consisting of ═S and a hydrocarbyl ring comprising from three to six members; provided, however, that at least one of R 1′ , R 2′ , R 3′ and R 4′ is other than hydrogen.