Preparation, structural organization, and thermal behavior of the ion-polymeric gold(III)–zinc(II)–dibutylammonium complex ([NH2(C4H9)2][Au{S2CN(C4H9)2}2][ZnCl4)]n

Abstract

Structural organization and thermal behavior of a new polymeric heteronuclear of gold(III)-zinc-dibutylammonium complex ([NH₂(C₄H₉)₂][Au{S₂CN(C₄H₉)₂}₂][ZnCl₄])_n (I), obtained by a heterogeneous reaction between freshly precipitated binuclear zinc dibutyldithiocarbamate [Zn₂{S₂CN(C₄H₉)₂}₄] and a H[AuCl₄] solution in 2M HCl, is studied. According to single crystal XRD data the crystal structure of the obtained compound is determined and its main structural units are complex [NH₂(C₄H₉)₂]⁺ and [Au{S₂CN(C₄H₉)₂}₂]⁺ cations and complexе [ZnCl₄]^2– anions. Dibutylammonium cations are hydrogen bonded to tetrachlorozincate ions, forming zigzag polymer chains. On the side of the chains there are discrete complex [Au{S₂CN(C₄H₉)₂}₂]⁺ cations characterized by a planar tetragonal structure and a uniform spatial orientation. The thermal behavior of I is investigated by synchronous thermal analysis. The multistage process of thermal destruction involves the thermolysis of the cation and anion parts (with the release of metallic gold, zinc chloride and a partial formation of zinc sulfide).