Acta Cryst. (2012). E68, o941 [ doi:10.1107/S1600536812008677 ]
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-HO hydrogen bonds into inversion dimers. The dimers are further connected by C-HO hydrogen bonds and - stacking interactions, with centroid-centroid distances of 3.6934 (9) and 3.6282 (9) Å.
Online 3 March 2012
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