title: 4,4'-Bipyridine-trans,trans-hexa-2,4-dienedioic acid (1/1).
abstract: The title cocrystal, C(10)H(8)N(2)·C(6)H(6)O(4), crystallizes with half-mol-ecules of 4,4'-bipyridine and trans,trans-hexa-2,4-dienedioic acid in the asymmetric unit, as each is located about a crystallographic inversion center. The bipyridine molecule is planar from symmetry. In the dicarboxylic acid molecule, the O-C-C-C torsion angle is -13.0 (2)°. In the crystal, O-H⋯N and C-H⋯O hydrogen bonds generate a three-dimensional network.
authors.forename: Suk-Hee
authors.initials: SH
authors.lastname: Moon
authors.forename: Ki-Min
authors.initials: KM
authors.lastname: Park