期刊名称：Walailak Journal of Science and Technology (WJST)
印刷版ISSN：2228-835X
出版年度：2012
卷号：9
期号：4
页码：375-380
DOI：10.2004/wjst.v9i4.246
语种：English
出版社：Institute of Research and Development, Walailak University.
摘要：Crystal structures of methyl 2-pentyl-4-hydroxy-2 H -1,2-benzothiazine-3-carboxylate-1,1-dioxide 1 and methyl 2-pentenyl-4-hydroxy-2 H -1,2-benzothiazine-3-carboxylate-1,1-dioxide 2 have been determined after their synthesis from saccharin. 1 and 2 crystallize in a monoclinic and orthorhombic crystal system, respectively. The asymmetric unit of both contains one molecule of each compound and shows intramolecular O-H×××O interactions generating six membered ring motifs S 1 1 (6). Intermolecular hydrogen bonding interactions have been observed in the molecule with the pentyl side chain. The thiazine ring in both molecules adopts a half chair conformation with a r.m.s. deviation of 0.2049 Å and 0.2161 Å.
关键词：1,2-benzothiazine, single crystal, structure studies, X-rays, oxicam
