Sulfur mononitride

Names
Preferred IUPAC name sulfur mononitride
Systematic IUPAC name Azaniumylsulfanidylidyne
Other names Aminiosulfanidylidyne Thionitroso radical Thionitrosyl radical
Identifiers
CAS Number	12033-56-6
3D model (JSmol)	Interactive image
Abbreviations	(NS)(.)
ChEBI	CHEBI:29451
ChemSpider	4576119
Gmelin Reference	660
PubChem CID	5463441
CompTox Dashboard (EPA)	DTXSID50923331
InChI InChI=1S/H3NS/c1-2/h1H3 Key: ZGSDJMADBJCNPN-UHFFFAOYSA-N
SMILES [N+][S-]
Properties
Chemical formula	NS
Molar mass	46.07 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Sulfur mononitride is an inorganic compound with the formula SN. It is the sulfur analogue of the radical nitric oxide, NO. It can be produced through electrical discharges in mixtures of nitrogen and sulfur compounds, as well as the reaction of nitrogen with sulfur vapor.^[1] In outer space, this compound was first detected in the giant molecular cloud Sgr B2. It was subsequently observed in cold dark clouds and in the comae of comets.^[2]

Bonding

The valence electrons of this compound match those of nitric oxide. Unlike NO, NS reacts upon condensation to form polythiazyl or tetrasulfur tetranitride. Sulfur mononitride can be described as some average of a set of resonance structures, one of which has a bond order of one accompanied by charge separation.^{[citation needed][clarification needed]}

Related compounds

• Trithiazyl trichloride (NSCl)₃