N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl) acetamide-naphthalene-2,3-diol (1/1)

Abstract

In the reaction of naphthalene-2,3-diol and 4-amino-anti-pyrine in the presence of acetic acid, the amine function is acetyl-ated and the resulting acetamide co-crystallizes with the diol in the title compound, C 13H15N3O2·C 10H8O2, with 1:1 molar stoichiometry. The two components are linked by two O-H⋯O=C hydrogen bonds. One of the hydroxy groups inter-acts with the pyrazolone carbonyl O atom and the other hydroxy group inter-acts with the amide O atom of another component, generating a chain motif. Adjacent chains are linked into a layer motif via N-H⋯O inter-actions involving only the heterocyclic acetamide component.