Crystal structure and Hirshfeld surface analysis of (E)-2-[1-hydroxy-2-(pyridin-2-yl)ethyl]-4-[2-(4-methoxyphenyl)diazen-1-yl]phenol
2019
In the title compound, C20H19N3O3, the configuration about the azo N=N bond is E, and the central benzene ring is inclined to the pyridine ring by 31.43 (8)° and to the 4-methoxyphenyl ring by 4.73 (8)°. In the crystal, molecules are linked by pairs of O—H⋯N hydrogen bonds, forming inversion dimers with an R22(12) ring motif. The dimers are linked by O—H⋯O and C—H⋯O hydrogen bonds, forming layers parallel to the ac plane. There are C—H⋯π interactions present within the layers and between the layers, leading to the formation of a supramolecular framework. The layers are also linked by offset π–π interactions, with an interplanar distance of 3.416 (2) A.
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