Abstract
The asymmetric unit of the title compound, C18H18N2O2S.0.375H2O, has two independent organic molecules (A and B) and 3/4 of a water molecule distributed over three sites. In molecule A, the 1, 3-thiazine ring is in a boat conformation, with the C atoms at the 2- and 5-positions out of the plane. The angle between the two phenyl rings is 51.70 (12)°. In molecule B, the thiazine ring is in a half-chair conformation, with the S atom forming the back of the half-chair. The angle between the two phenyl rings is 84.44 (14)°. The A molecule features an intramolecular N - H⋯O hydrogen bond, which closes an S(5) ring motif. In the crystal, the corresponding N - H grouping of the B molecule participates in an intermolecular hydrogen bond to the A molecule. The A molecule participates in a C - H⋯O interaction back to the B molecule, whilst the B molecule features an intramolecular C - H⋯O link, which generates an S(10) loop.
Original language | English |
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Pages (from-to) | 62-64 |
Number of pages | 3 |
Journal | Acta Crystallographica Section E: Structure Reports Online |
Volume | 71 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Jan 2015 |
Bibliographical note
AcknowledgementsWe acknowledge NSF funding (CHEM-0131112) for the X-ray diffractometer. We also express gratitude to Euticals for the gift of T3P in 2-methyltetrahydrofuran, and to Oakwood Products for the gift of N-acetyl-L-cysteine.
Keywords
- 1,3-thiazin-4-one
- Boat
- Crystal structure
- Half-chair
- Hydrogen bonding
- Thiazine ring