The asymmetric unit of the title compound, C(20)H(18)ClN(5)O(3)S, contains two independent mol-ecules with significantly different conformations of the heterocyclic thia-zine rings. In both mol-ecules, the thia-zine rings adopt half-chair conformations, with the S atoms displaced by 0.382 (3) and 0.533 (3) Å and N atoms -0.351 and -0.275 Å, respectively, from the planes formed by the remaining ring atoms. The crystal structure is stabilized by weak inter-molecular N-H⋯O and C-H⋯O inter-actions.

DOI: 10.1107/S160053681005227X

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@inproceedings{Ahmad2010, title={ N′-(2-Chloro­benzyl­idene)-2-(3,4-dimethyl-5,5-dioxo-2H,4H-pyrazolo­[4,3-c][1,2]benzothia­zin-2-yl)acetohydrazide}, author={Matloob Ahmad and Hamid Latif Siddiqui and Manzoor Iqbal Khattak and Saeed Ahmad and Masood Parvez}, booktitle={Acta crystallographica. Section E, Structure reports online}, year={2010} }