Di-4-pyridyl disulfide–isophthalic acid (1/1)

In the title 1:1 cocrystal, C(10)H(8)N(2)S(2)·C(8)H(6)O(4), the asymmetric unit contains an isophthalic acid mol­ecule and a 4,4′-dipyridyl disulfide mol­ecule. The two carboxyl groups of isophthalic acid inter­act with neighbouring 4,4′-dipyridyl disulfide mol­ecules through O—H⋯N hydrogen bonds, forming a one-dimensional zigzag chain. Neighbouring chains are linked to each other via π–π stacking inter­actions between the pyridyl rings of adjacent 4,4′-dipyridyl disulfide mol­ecules [centroid-centroid distance = 3.7346 (6) Å], resulting in a layered motif. The dihedral angle between pyridine rings of 84.13 (7)° and the C—S—S—C torsion angle of 91.95 (1)° confirm the gauche conformation of 4,4′-dipyridyl disulfide.