2-[(E)-1,1-Dioxo-2-(2,4,5-trifluorobenzyl)-3,4-dihydro-2H-1,2-benzothiazin-4-ylidene]acetic acid

Abstract

Key indicators: single-crystal X-ray study; T = 153 K; mean (C-C) = 0.002 Å; R factor = 0.042; wR factor = 0.114; data-to-parameter ratio = 17.4.In the asymmetric unit of the title compound, C 17 H 12 F 3 NO 4 S, there are two conformationally similar molecules in which the heterocyclic thiazine ring adopts a half-chair conformation, with the dihedral angle between the two benzene rings being 24.84 (8) ExperimentalCrystal data