SYNTHESIS AND CHARACTERIZATION OF BIS(CARBOXYLATO)ZINC(II) (C₆ - C₈) - CRYSTAL STRUCTURE OF BIS(HEXANOATO)ZINC(II), Zn(O₂CC₅H₁₁)₂ - FORM A

Primož Šegedin, Nina Lah, Mojca Žefran, Ivan Leban and Ljubo Goliè

Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerèeva 5, P.O.B. 537, SI-1001 Ljubljana, Slovenia, e-mail: Primoz.Segedin@uni-lj.si

Abstract

Different synthetic routes were used for the preparation of zinc(II) alkyl carboxylates with 6 - 8 carbon atoms. Isolated products were characterised by standard physicochemical methods. Powder diffraction patterns, IR spectra, DTA curves and 13C solid state NMR spectra indicate presence of two different polymorphic forms in the case of hexanoate and heptanoate. No fungicidal activity of isolated compounds was observed. Crystal structure of Zn(O₂CC₅H₁₁)₂- form A was determined by X-ray single-crystal method. Each Zn atom is coordinated tetrahedrally by oxygen atoms of four different hexanoate ligands while each hexanoate ligand is bridging two tetrahedral zincs in syn-anti mode thus forming a typical layered structure.