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organic compounds
The crystal structure of the title compound, 6-tert-butyl-2-(2-chlorophenyldiazenyl)-4-methylphenol, C17H19ClN2O, determined at room temperature, shows that the molecule is essentially planar, as found for other azobenzene derivatives, and features a significant intramolecular HN interaction of 1.75 (3) Å resulting in the formation of a six-membered ring.