title: Crystal structure of 1-((1E)-{(E)-2-[(2-hydroxy-naphthalen-1-yl)methyl-idene]hydrazin-1-yl-idene}meth-yl)naphthalen-2-ol.
abstract: The complete mol-ecule of the title compound, C22H16N2O2, is generated by a crystallographic inversion centre at the mid-point of the central N-N bond. Two intra-molecular O-H⋯N hydrogen bonds occur.
authors.affiliation: Department of Chemistry, Periyar University, Salem 636 011, India.
authors.forename: Paranthaman
authors.initials: P
authors.lastname: Vijayan
authors.affiliation: Department of Chemistry, Periyar University, Salem 636 011, India.
authors.forename: Periasamy
authors.initials: P
authors.lastname: Viswanathamurthi
authors.affiliation: Institute of Mineralogy and Crystallography Geozentrum, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria.
authors.forename: Michel
authors.initials: M
authors.lastname: Fleck
authors.affiliation: Centre of Advanced Studies in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: Sugumar
authors.initials: S
authors.lastname: Paramasivam
authors.affiliation: Centre of Advanced Studies in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: Ponnuswamy Mondikalipudur
authors.initials: PM
authors.lastname: Nanjappagounder
keywords: Schiff base derivative; crystal structure; intra­molecular hydrogen bonding