2,2′-(Disulfanediyl)dibenzoic acid–N,N′-bis(4-pyridylmethyl)ethanedithioamide (1/1)

The asymmetric unit of the title co-crystal, C14H14N4S2·C14H10O4S2, comprises a twisted 2,2′-(disulfanediyl)dibenzoic acid molecule [dihedral angle between the benzene rings = 83.53 (14)°] and a U-shaped molecule of N,N′-bis(4-pyridylmethyl)ethanedithioamide in which intramolecular N—H...S hydrogen bonds are observed. Two molecules of each form a centrosymmetric ring, with an extended chair conformation, mediated by carboxyl–pyridine O—H...N hydrogen bonds between the carboxylic acid groups of two 2,2′-(disulfanediyl)dibenzoic acid molecules and pyridine-N atoms of two N,N'-bis(4-pyridylmethyl)ethanedithioamide molecules. The tetrameric aggregates are linked into a supramolecular chain along the b axis via amide–carbonyl N—H...O hydrogen bonds