5-(Phenyldiazenyl)tropolone

Abstract

The title compound [systematic name: (E)-2-hydroxy-5-(phenyldiazenyl)cyclohepta-2,4,6-trien-1-one], C13H10N2O2, is essentially planar with an r.m.s. deviation of 0.036 (2) Å and a dihedral angle of 1.57 (8)° between the phenyl and tropolone rings. In the crystal, molecules are linked by pairs of O—H...O hydrogen bonds into inversion dimers. The dimers are further connected by C—H...O hydrogen bonds and π–π stacking interactions, with centroid–centroid distances of 3.6934 (9) and 3.6282 (9) Å.