title: 3-{[(E)-(2-Hydroxynaphthalen-1-yl)methylidene]amino}pyridinium per-chlorate.
abstract: In the title Schiff base salt, C16H13N2O(+)·ClO4 (-), the pyridine ring and the naphthalene ring system are approximately co-planar [making a dihedral angle of 6.05 (12)°] and an intra-molecular O-H⋯N hydrogen bond occurs between the hydroxyl and imino groups. In the crystal, the cations and anions are linked by N-H⋯O and weak C-H⋯O hydrogen bonds, forming the supra-molecular layers parallel to (100). The crystal studied was an inversion twin refined with minor component = 0.43 (13).
authors.affiliation: Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale, CHEMS, Université Constantine 1, 25000, Algeria.
authors.forename: Maamar
authors.initials: M
authors.lastname: Damous
authors.affiliation: Laboratory of Solid State Chemistry and Mössbauer Spectroscopy, Laboratories for Inorganic Materials, Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec, H3G 1M8, Canada.
authors.forename: George
authors.initials: G
authors.lastname: Dénès
authors.affiliation: Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale, CHEMS, Université Constantine 1, 25000, Algeria ; Département Sciences de la Matière, Faculté des Sciences Exactes et Sciences de la Nature et de la Vie, Université Oum El Bouaghi 04000, Algeria.
authors.forename: Sofiane
authors.initials: S
authors.lastname: Bouacida
authors.affiliation: Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale, CHEMS, Université Constantine 1, 25000, Algeria.
authors.forename: Meriem
authors.initials: M
authors.lastname: Hamlaoui
authors.affiliation: Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale, CHEMS, Université Constantine 1, 25000, Algeria.
authors.forename: Hocine
authors.initials: H
authors.lastname: Merazig
authors.affiliation: Laboratoire de Chimie de Coordination, UPR CNRS 8241, 205 route de Narbonne, 31077 Toulouse cedex, France.
authors.forename: Jean-Claude
authors.initials: JC
authors.lastname: Daran