Crystal Structure of Some Charge-Control Agents: 3,5-di-tert-butyl-2-hydroxybenzoic Acid and its Zinc Complexes
Abstract:The title compounds are charge-control agents used in electrophotography. In 3,5-Di-tert-butyl-2-hydroxybenzoic acid (TBS), there are two independent molecules A and B in the asymmetric unit. The molecules form centrosymmetric dimers A-A and B-B via pair of O−H…O hydrogen bonds between the two carboxyl groups. On the other hand, the zinc complex of TBS (Zn(TBS)2) is found to include solvent molecules when recrystallized from ethanol and acetonitrile: (Zn(TBS)2) (ethanol)2 and (Zn(TBS)2) (acetnitrile)2. The former complex has C 2 symmetry, and exhibits a deformed octahedral coordination. Two O atoms of the ethanol molecules are coordinated in a cis fashion to the Zn atom. On the other hand, the latter forms a trinuclear complex: one central six-coordinate Zn complex and two four-coordinate Zn ones. Each O-ligand of TBS is coordinated to a different Zn atom.
Document Type: Research Article
Publication date: 2004-01-01
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