1,4-Thiazine

Names
Preferred IUPAC name 4H-1,4-Thiazine
Other names Parathiazine
Identifiers
CAS Number	290-57-3 1,2: 11084-06-3 1,3: 27813-20-3
3D model (JSmol)	1,2: Interactive image 1,3: Interactive image 1,4: Interactive image
ChemSpider	1,2: 10609054 1,3: 10609007 1,4: 10465777
PubChem CID	1,2: 15789245 1,3: 15789246 1,4: 15789247
CompTox Dashboard (EPA)	1,2: DTXSID50911874 1,3: DTXSID50578325
InChI 1,2: InChI=1S/C4H5NS/c1-2-4-6-5-3-1/h1-5H Key: AGIJRRREJXSQJR-UHFFFAOYSA-N 1,3: InChI=1S/C4H5NS/c1-2-5-4-6-3-1/h1-3H,4H2 Key: NTYABNDBNKVWOO-UHFFFAOYSA-N 1,4: InChI=1S/C4H5NS/c1-3-6-4-2-5-1/h1-5H Key: ZOXMLSDKXHNVOQ-UHFFFAOYSA-N
SMILES 1,2: C1=CNSC=C1 1,3: C1N=CC=CS1 1,4: C\1=C\N\C=C/S/1
Properties
Chemical formula	C4H5NS
Molar mass	99.15 g·mol−1
Density	0.8465 g/cm3
Boiling point	76.5 °C
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

Thiazine /ˈθaɪəziːn/ is an organic compound containing a ring of four carbon, one nitrogen and one sulfur atom. There are three isomers of thiazine, 1,2-thiazine, 1,3-thiazine, and 1,4-thiazine, which differ by the arrangement of the nitrogen and sulfur atoms in the ring.

Derivatives of thiazine, often referred to as thiazines, are used for dyes, tranquilizers and insecticides.

Preparation

1,4-thiazine can be prepared from the corresponding dione using aluminium powder at high temperature.^[1]

Tautomers

Three tautomers of 1,4-thiazine exist as above.