Abstract
The structure of the title compound, C14H12N2O2 {systematic name: 2,2 '-[hydrazinediylidenebis(methanylylidene)]diphenol}, has already been determined in the triclinic space group P (1) over bar with Z = 4 [El-Medani, Aboaly, Abdalla & Ramadan (2004). Spectrosc. Lett. 37, 619-632]. However, the correct space group should be P2(1)/c with Z = 4. This structure is a new polymorph of the already known monoclinic polymorph of salicyladehyde azine, which crystallizes in space group P2(1)/n with Z = 2. The benzene rings form a dihedral angle of 46.12 (9 degrees. Two intramolucular O-H center dot center dot center dot N hydrogen bonds occur.