In the title compound, C3H12N2 2+·2Cl−, the cations are disordered over two well resolved positions in a 0.525 (13):0.475 (13) ratio. The disorder involves two C atoms which assume positions that make an almost mirror-symmetrical system. Similar disorder is observed both at room temperature and at 120 (1) K. The conformation of the NCCN chain in both components is close to trans (the torsion angles ca ±170°), while that of CCCN chain is close to gauche (±50°). In the crystal, a network of relatively strong N—H⋯Cl hydrogen bonds connects the cations and anions into one-cation-deep layers parallel to (001); there are R 2 4(8) and R 2 4(11) ring motifs within the plane. The planes are only loosely connected by van der Waals contacts and electrostatic interactions between cations and anions
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