2-{(E)-[(2Z)-(3-Chloro-1-methyl-2,2-dioxo-3,4-dihydro-1H-2, 1-benzothiazin-4-ylidene)hydrazinylidene]methyl}phenol

Abstract

In the title compound, C 16H 14ClN 3O 3S, the thia-zine ring adopts a sofa (half-chair) conformation, with an r.m.s. deviation from the mean plane of 0.23 Å. The S atom and S-bonded C atom exhibit the maximum deviations from the thia-zine mean plane [-0.3976 (12) and 0.3179 (14) Å, respectively]. The conformations around the double bonds in the R 2C=N - N=CHR unit are Z and E. An intra-molecular O - H⋯N hydrogen bond with the hy-droxy group as donor generates an S(6) ring motif. In the crystal, pairs of weak C - H⋯O inter-actions connect the molecules, forming inversion dimers.