title: Nicotinohydrazide.
abstract: IN THE TITLE COMPOUND (ALTERNATIVE NAME: pyridine-3-carbo-hydrazide, C(6)H(7)N(3)O), the asymmetric unit contains a single mol-ecule. In contrast with nicotinic acid and nicotinamide, the C=O bond is found to be oriented cis with respect to the C(ipso) C N fragment in the pyridine ring. The pyridine ring and the hydrazide group make a dihedral angle of 34.0 (2)°. In the crystal structure, mol-ecules are associated into a three-dimensional framework by a combination of N-H⋯N and three-centre N-H⋯O hydrogen bonds.
authors.affiliation: Chemistry Department, 'Sapienza' University of Rome, P. le A. Moro, 5, I-00185 Rome, Italy.
authors.forename: Gustavo
authors.initials: G
authors.lastname: Portalone
authors.forename: Marcello
authors.initials: M
authors.lastname: Colapietro