Crystal structure and Hirshfeld surface analysis of the orthorhombic polymorph of a Zn^II complex with 3,5-dinitrobenzoic acid and ethylenediamine

Abstract

<jats:p>During systematic investigations of the biological action enhancement of well known compounds, a new metal complex, namely, bis(3,5-dinitrobenzoato)(ethane-1,2-diamine)zinc(II), [Zn(C<jats:sub>7</jats:sub>H<jats:sub>3</jats:sub>N<jats:sub>2</jats:sub>O<jats:sub>6</jats:sub>)<jats:sub>2</jats:sub>(C<jats:sub>2</jats:sub>H<jats:sub>8</jats:sub>N<jats:sub>2</jats:sub>)], was synthesized and the structure of its orthorhombic form has determined. The synthesis and crystal structure of the monoclinic polymorph has previously been reported [Ibragimov <jats:italic>et al.</jats:italic> (2020). <jats:italic>Rep. Uzb. Acad. Sci.</jats:italic> <jats:bold>1</jats:bold>, 45–50]. The zinc ion has a distorted tetrahedral environment formed by two monodentate 3,5-dinitrobenzoato anions and chelating ethylenediamine molecule. In the crystal, the complex molecules are linked by N—H...O and C—H...O hydrogen bonds into a two-dimensional network parallel to the <jats:italic>ac</jats:italic> plane. The Hirshfeld surface analysis indicates that the most important contributions to the crystal packing are from H...O/O...H (43.4%) and O...C/C...O (17.7%) interactions.</jats:p>