Two new zinc(II) acetates with 3– and 4–aminopyridine: syntheses and structural properties

Abstract

The synthesis and characterization of two new zinc(II) coordination compounds with 3– and 4–aminopyridine are reported. They were obtained after dissolving Zn(CH3COO)2·2H2O in different solutions of 3– and 4–aminopyridine. The products were characterized structurally by single–crystal X–ray diffraction analysis. Colourless crystals of the compound synthesized by the reaction of Zn(CH3COO)2·2H2O and 3–aminopyridine (3–apy), result in a trinuclear complex with the formula [Zn3(O2CCH3)6(3–apy)2(H2O)2] (1). The compound consists of two terminal Zn atoms, coordinated tetrahedrally, and one central Zn atom, coordinated octahedrally. Colourless crystals, obtained by the reaction of Zn(CH3COO)2·2H2O with 4–aminopyridine (4–apy), consist of a mononuclear complex [Zn(O2CCH3)2(4–apy)2] (2). Hydrogen‒bonding interactions in the crystal structures of both complexes are discussed.

Keywords

• zinc(II) acetate dihydrate
• aminopyridine
• X–ray crystal structure
• hydrogen bonds