title: Form II of adipic acid-nicotinohydrazide (1/2).
abstract: The crystal structure of the title co-crystal, 2C(6)H(7)N(3)O·C(6)H(10)O(4), is a second polymorph, designated form II, of the co-crystal formed between the two mol-ecules [Lemmerer et al. (2011 ▶). CrystEngComm, 13, 55-59]. The asymmetric unit comprises one mol-ecule of nicotinic acid hydrazide, and one half-mol-ecule of adipic acid (the entire mol-ecule is completed by the application of a centre of inversion). In the crystal, mol-ecules assemble into a three-dimensional network of hydrogen bonds, formed by three N-H⋯O hydrogen bonds and one O-H⋯N hydrogen bond. The O-H⋯N hydrogen bond formed between the carboxyl group and the pyridine ring is supported by a C-H⋯O hydrogen bond.
authors.forename: Andreas
authors.initials: A
authors.lastname: Lemmerer
authors.forename: Joel
authors.initials: J
authors.lastname: Bernstein
authors.forename: Volker
authors.initials: V
authors.lastname: Kahlenberg