Crystal Structure of 2-((E)-(5-Bromo-2- Hydroxybenzylidene)hydrazono)-1,2-Diphenylethanone

Abstract

The molecular structure of the title compound, C<inf>21</inf>H<inf>15</inf>Br<inf>1</inf>N<inf>2</inf>O<inf>2</inf>, was characterized by single crystal X-ray diffraction. The compound crystallizes in the triclinic sp. gr. P1 ¯ with Z = 2. The molecule is not planar: the dihedral angle between the planes of two aromatic rings [C1/C6] and [C16/C21] is 84.9(2)°. The other dihedral angle between two aromatic rings [C9/C14] and [C16/C21] is 88.8(2)°. The title compound exists as a phenol-imine tautomer, in which a strong intramolecular O–HN hydrogen bond is formed. This study verifies the preference of the phenol-imine tautomeric form in the solid state. A stacking interactions are also observed, which may influence crystal stability: the distance between centroids is 3.702(2) Å. © 2018, Pleiades Publishing, Inc.