2,2′-(Disulfanediyl)dibenzoic acid–N,N′-bis­(3-pyridyl­meth­yl)ethane­diamide (1/1)

The asymmetric unit of the title cocrystal, C(14)H(14)N(4)O(2)·C(14)H(10)O(4)S(2), comprises a twisted 2,2′-(disulfanediyl)dibenzoic acid mol­ecule [dihedral angle between the benzene rings = 76.35 (10)°] and a U-shaped N,N′-bis­(3-pyridyl­meth­yl)ethane­diamide mol­ecule with the pyridyl groups lying to the same side of the central diamide moiety [C—C—C—N = 113.8 (2) and −117.6 (2)°]. The latter aggregate into supra­molecular tapes propagating along the a axis via centrosymmetric eight-membered amide {⋯OCNH}(2) synthons. Intra­molecular N—H⋯O hydrogen bonds are observed. The 2,2′-(disulfanediyl)dibenzoic acid mol­ecules form carbox­yl–pyridine O—H⋯N hydrogen bonds, bridging a pyridine residue below the plane of the tape and one above the plane with two inter­vening N,N′-bis­(3-pyridyl­meth­yl)ethane­diamide mol­ecules. The supra­molecular chains are consolidated in the crystal packing by C—H⋯O contacts. An inter­molecular C—H⋯S inter­action also occurs.