The crystal structures of two isomers of 5-(phenyl- isothiazolyl)-1,3,4-oxathiazol-2-one

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dc.creator Zhu, Shuguang
dc.creator Schriver, Melbourne J.
dc.creator Hendsbee, Arthur D.
dc.creator Masuda, Jason Douglas, 1977-
dc.date.accessioned 2021-09-24T13:04:11Z
dc.date.available 2021-09-24T13:04:11Z
dc.date.issued 2017-11-01
dc.identifier.issn 2056-9890
dc.identifier.uri http://library2.smu.ca/xmlui/handle/01/29929
dc.description Published version en_CA
dc.description.abstract The syntheses and crystal structures of two isomers of phenyl iso&shy;thia&shy;zolyl oxa&shy;thia&shy;zolone, C<sub>11</sub>H<sub>6</sub>N<sub>2</sub>O<sub>2</sub>S<sub>2</sub>, are described [systematic names: 5-(3-phenyl&shy;iso&shy;thia&shy;zol-5-yl)-1,3,4-oxa&shy;thia&shy;zol-2-one, (I), and 5-(3-phenyl&shy;iso&shy;thia&shy;zol-4-yl)-1,3,4-oxa&shy;thia&shy;zol-2-one, (II)]. There are two almost planar (r.m.s. deviations = 0.032 and 0.063 &Aring;) mol&shy;ecules of isomer (I) in the asymmetric unit, which form centrosymmetric tetra&shy;mers linked by strong S<sup>...</sup>N [3.072 (2) &Aring;] and S<sup>...</sup>O contacts [3.089 (1) &Aring;]. The tetra&shy;mers are &pi;-stacked parallel to the <em>a</em>-axis direction. The single mol&shy;ecule in the asymmetric unit of isomer (II) is twisted into a non-planar conformation by steric repulsion [dihedral angles between the central iso&shy;thia&shy;zolyl ring and the pendant oxa&shy;thia&shy;zolone and phenyl rings are 13.27 (6) and 61.18 (7)&deg;, respectively], which disrupts the &pi;-conjugation between the heteroaromatic iso&shy;thia&shy;zoloyl ring and the non-aromatic oxa&shy;thia&shy;zolone heterocycle. In the crystal of isomer (II), the strong S<sup>...</sup>O [3.020 (1) &Aring;] and S<sup>...</sup>C contacts [3.299 (2) &Aring;] and the non-planar structure of the mol&shy;ecule lead to a form of &pi;-stacking not observed in isomer (I) or other oxathiazolone derivatives. en_CA
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dc.language.iso en en_CA
dc.publisher International Union of Crystallography en_CA
dc.relation.uri https://doi.org/10.1107/S2056989017015067
dc.rights <a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/80x15.png" /></a> This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>
dc.subject.lcsh Thiazoles
dc.subject.lcsh Bioconjugates
dc.subject.lcsh Nitriles
dc.title The crystal structures of two isomers of 5-(phenyl- isothiazolyl)-1,3,4-oxathiazol-2-one en_CA
dc.type Text en_CA
dcterms.bibliographicCitation Acta Crystallographica: Section E 73(11), 1726-1731. (2017) en_CA
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Published Version: https://doi.org/10.1107/S2056989017015067
 
 

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