Crystal structure and Hirshfeld surface analysis of the cocrystal formed between 2,3-diaminopyrazine and 2,3,5,6-tetrafluoroterephthalic acid

The cocrystal formed between 2,3-di-amino-pyrazine and 2,3,5,6-tetra-fluoro-phthalic acid, crystallizes as the solvated salt bis-(2,3-di-amino-pyrazin-1-ium) 2,3,5,6-tetra-fluoro-phthalate-2,3,5,6-tetra-fluoro-phthalic acid (1/1), 2C₄H₇N₄ ⁺·C₈F₄O₄ ^2-·C₈H₂F₄O₄, in the triclinic space group <i>P</i>1 with one unique protonated 2,3-di-amino-pyrazinium cation, one half a tetra-fluoro-phthalic acid mol-ecule and one half of a tetra-fluoro-phthalate anion. The cocrystal forms a supra-molecular network with cooperative neutral and charge-assisted hydrogen bonding. In this, the linear network of alternating pyrazinium and tetra-fluoro-phenyl moieties is crosslinked through bifurcated hydrogen bonds of two amino H atoms and a carboxyl oxygen to form a corrugated two-dimensional network.