Abstract
The molecule of the title compound, C19H15N3O, is approximately planar and displays a trans configuration with respect to the C=N and N=N double bonds. An intramolecular O—H⋯N hydrogen bond generates an S(6) ring motif. The dihedral angles between the hydroxyphenyl ring and the phenyl and benzene rings are 4.31 (8) and 6.60 (8)°, respectively. The dihedral angle between the phenyl and benzene rings linked by the azo group is 2.70 (8)°. The imino group is coplanar with the hydroxyphenyl ring, as shown by the C—C—C—N torsion angle of −1.8 (2)°. The azo group is disordered over two position with refined site-occupancy factors of ca 0.87/0.13. In the crystal structure, molecules are linked together by intermolecular C—H⋯O interactions along the c axis and also are packed as one-dimensional extended chains down the b axis.
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