Crystal structure and Hirshfeld surface analysis of bis(2,6-diaminopyridinium) tetrachloridocobaltate( II).

In the title mol­ecular salt, (C₅H₈N₃)₂[CoCl₄], the cations are protonated at their pyridine N atoms and the anion is an almost regular tetra­hedron. The crystal structure consists of alternating inorganic layers, built from tetra­chlorido­cobaltate anions, and organic layers formed by protonated cations of 2,6-di­amino­pyridinium. The crystal packing is governed by C/N—HCl hydrogen-bonding inter­actions between the organic and the inorganic ions and ClCl inter­actions. Moreover, the cations show a π–π stacking inter­action [inter­centroid distance = 3.763 (2) Å]. The prevalence of these inter­actions is illustrated by an analysis of the three-dimensional Hirshfeld surface and by two-dimensional fingerprint plots. [ABSTRACT FROM AUTHOR]