-
Name
1$l^{4},3-dithia-2,4-diazacyclobuta-1,4-diene
- EINECS
- CAS No. 25474-92-4
- Article Data2
- CAS DataBase
- Density 2.22g/cm3
- Solubility
- Melting Point
- Formula N2S2
- Boiling Point °Cat760mmHg
- Molecular Weight 92.1454
- Flash Point °C
- Transport Information
- Appearance
- Safety An explosive sensitive to shock, friction, pressure, or heating above 30°C. Potentially explosive reaction with complexes with beryllium chloride or titanium tetrachloride. When heated to decomposition it emits toxic fumes of SOx and NOx. See also NITRIDES.
- Risk Codes
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Molecular Structure
- Hazard Symbols
- Synonyms 1,3,2,4-Dithia(3-SIV)diazete(9CI); Nitrogen sulfide (N2S2); Sulfur nitride (S2N2) (6CI,7CI,8CI); Disulfurdinitride
- PSA 82.26000
- LogP 0.59960
Disulfur dinitride Chemical Properties
Molecule structure of Disulfur dinitride (CAS NO.25474-92-4):
IUPAC Name: 2λ4,4-Dithia-1,3-diazacyclobuta-1,2-diene
Molecular Weight: 92.1434 g/mol
Molecular Formula: N2S2
Density: 2.22 g/cm3
Index of Refraction: 2.075
Molar Refractivity: 21.71 cm3
Molar Volume: 41.4 cm3
Polarizability: 8.61×10-24 cm3
Surface Tension: 123.5 dyne/cm
XLogP3-AA: 2.2
H-Bond Acceptor: 2
Exact Mass: 91.950289
MonoIsotopic Mass: 91.950289
Topological Polar Surface Area: 24.7
Heavy Atom Count: 4
Complexity: 42.1
Canonical SMILES: N1=S=NS1
InChI: InChI=1S/N2S2/c1-3-2-4-1
InChIKey: HGFWWXXKPBDJAH-UHFFFAOYSA-N
Disulfur dinitride Production
At low pressure (1mm Hg), passing gaseous S4N4 over silver metal wool at 250-300 °C can yield cyclic S2N2. The silver reacts with the sulfur produced by the thermal decomposition of the S4N4 to form Ag2S, and the resulting Ag2S can catalyze the conversion of the S4N4 into the four-membered ring S2N2,
S4N4 + 8 Ag → 4 Ag2S + 2 N2
S4N4 → 2S2N2
Disulfur dinitride Safety Profile
An explosive sensitive to shock, friction, pressure, or heating above 30°C. Potentially explosive reaction with complexes with beryllium chloride or titanium tetrachloride. When heated to decomposition it emits toxic fumes of SOx and NOx. See also NITRIDES.
Disulfur dinitride Specification
Disulfur dinitride (CAS NO.25474-92-4) will decompose explosively when the temperature is above 30°and it is sensitive by shock. It is insoluble in water, soluble in diethyl ether and traces of water cause it to polymerise into S4N4. Disulfur dinitride (CAS NO.25474-92-4) spontaneously polymerizes forming (SN)x in the solid state. It can form adducts with Lewis acids via a nitrogen atom, e.g. S2N2.BCl3, S2N2.2AlCl3, S2N2.SbCl5, S2N2.2SbCl5.
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