Space group revsion of the triclinic polymorph of salicylaldehyde azine

Abstract

The structure of the title compound, C 14H 12N 2O 2 {systematic name: 2,2′- [hydrazinediylidenebis(methanylyl-idene)]diphen-ol}, has already been determined in the triclinic space group P with Z = 4 [El-Medani, Aboaly, Abdalla & Ramadan (2004). Spectrosc. Lett. 37, 619-632]. However, the correct space group should be P21/c with Z = 4. This structure is a new polymorph of the already known monoclinic polymorph of salicyladehyde azine, which crystallizes in space group P21/n with Z = 2. The benzene rings form a dihedral angle of 46.12 (9)°. Two intramolucular O - H⋯N hydrogen bonds occur.