Disulfur dichloride

Disulfur dichloride
Wireframe model of disulfur dichloride
Ball and stick model of disulfur dichloride
Ball and stick model of disulfur dichloride
Spacefill model of disulfur dichloride
Spacefill model of disulfur dichloride
  Sulfur, S
  Chlorine, Cl
Names
IUPAC names
Disulfur dichloride
Dichlorodisulfane
Systematic IUPAC name
Chlorosulfanyl thiohypochlorite
Other names
  • Bis[chloridosulfur](SS)
  • Dimeric sulfenic chloride
  • Sulfur monochloride (incorrect name)
Identifiers
3D model (JSmol)
ChemSpider
DrugBank
ECHA InfoCard 100.030.021 Edit this at Wikidata
EC Number
  • 233-036-2
MeSH Sulfur+monochloride
RTECS number
  • WS4300000
UNII
UN number 3390
  • InChI=1S/Cl2S2/c1-3-4-2 checkY
    Key: PXJJSXABGXMUSU-UHFFFAOYSA-N checkY
  • InChI=1/Cl2S2/c1-3-4-2
    Key: PXJJSXABGXMUSU-UHFFFAOYAK
  • ClSSCl
Properties
S2Cl2
Molar mass 135.02 g·mol−1
Appearance Light-amber to yellow-red, oily liquid[1]
Odor pungent, nauseating, irritating[1]
Density 1.688 g/cm3
Melting point −80 °C (−112 °F; 193 K)
Boiling point 137.1 °C (278.8 °F; 410.2 K)
Decomposes, with loss of HCl
Solubility Soluble in ethanol, benzene, ether, THF, chloroform, CCl4[2]
Vapor pressure 7 mmHg (20 °C)[1]
−62.2·10−6 cm3/mol
1.658
Structure
C2
2 at sulfur atoms
gauche
1.60 D[2]
Hazards
GHS labelling:
GHS02: FlammableGHS06: ToxicGHS07: Exclamation markGHS09: Environmental hazard
Danger
H301, H314, H332, H400
P260, P261, P264, P270, P271, P273, P280, P301+P310, P301+P330+P331, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P310, P312, P321, P330, P363, P391, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oilInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
2
1
1
Flash point 118.5 °C (245.3 °F; 391.6 K)
234 °C (453 °F; 507 K)
Lethal dose or concentration (LD, LC):
150 ppm (mouse, 1 min) (1 ppm = 5.52 mg/m3)[3]
NIOSH (US health exposure limits):
PEL (Permissible)
TWA 1 ppm (5.52 mg/m3)[1]
REL (Recommended)
C 1 ppm (5.52 mg/m3)[1]
IDLH (Immediate danger)
5 ppm[1] (1 ppm = 5.52 mg/m3)
Safety data sheet (SDS) ICSC 0958
Related compounds
Related sulfur chlorides/oxychlorides
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Disulfur dichloride (or disulphur dichloride by the British English spelling) is the inorganic compound of sulfur and chlorine with the formula S2Cl2.[4][5][6][7] It is an amber oily liquid.

Sometimes, this compound is incorrectly named sulfur monochloride (or sulphur monochloride by the British English spelling), the name implied by its empirical formula SCl.

S2Cl2 has the structure implied by the formula Cl−S−S−Cl, wherein the dihedral angle between the Cla−S−S and S−S−Clb planes is 85.2°. This structure is referred to as gauche, and is akin to that for H2O2. A rare isomer of S2Cl2 is S=SCl2 (thiothionyl chloride); this isomer forms transiently when S2Cl2 is exposed to UV-radiation (see thiosulfoxides).

  1. ^ a b c d e f NIOSH Pocket Guide to Chemical Hazards. "#0578". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ a b Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
  3. ^ "Sulfur monochloride". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  4. ^ Holleman, A. F.; Wiberg, E. Inorganic Chemistry Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
  5. ^ Hartman, W. W.; Smith, L. A.; Dickey, J. B. (1934). "Diphenylsulfide". Organic Syntheses. 14: 36; Collected Volumes, vol. 2, p. 242.
  6. ^ R. J. Cremlyn An Introduction to Organosulfur Chemistry John Wiley and Sons: Chichester (1996). ISBN 0-471-95512-4
  7. ^ Garcia-Valverde M., Torroba T. (2006). "Heterocyclic chemistry of sulfur chlorides – Fast ways to complex heterocycles". European Journal of Organic Chemistry. 2006 (4): 849–861. doi:10.1002/ejoc.200500786.