Crystal structure of (E)-3-[(2,6-dimethylphenyl)diazenyl]-7-methyl-1H-indazole

Abstract

The title azo compound, C16H16N4, was synthesized from 2,6-dimethylaniline. The diazenyl group adopts a trans (E) conformation, with an N=N bond length of 1.265 (4) Å. The pyrazole ring is approximately planar. In the crystal, zigzag chains along the b-axis direction with a C(3) is graph-set motif are formed by N—H...N hydrogen bonds involving the pyrazole moiety.

Keywords

• crystal structure
• photochromism
• azo benzene
• pyrazole
• indazole
• chiral crystallization