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

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(C7H3N2O6)2(C2H8N2)], 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 et al. (2020[Ibragimov, A. B., Ashurov, J. M. & Ibragimov, A. B. (2020). Rep. Uzbek. Acad. Sci. 1, 45-50.]). Rep. Uzb. Acad. Sci. 1, 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 ac 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.