Sulfur dichloride

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Sulfur dichloride
Structure and dimensions of the sulfur dichloride molecule
Ball-and-stick model of sulfur dichloride
Ball-and-stick model of sulfur dichloride
Space-filling model of sulfur dichloride
Space-filling model of sulfur dichloride
Names
IUPAC name
  • Dichlorosulfane
  • Sulfur dichloride
  • Sulfur(II) chloride
Other names
  • Chloro thiohypobromite
  • Dichloro sulfide
  • Sulphur chloride
Identifiers
3D model (
JSmol
)
ChemSpider
ECHA InfoCard
100.031.014 Edit this at Wikidata
EC Number
  • 234-129-0
RTECS number
  • WS4500000
UNII
UN number 1828
  • InChI=1S/Cl2S/c1-3-2
    Key: FWMUJAIKEJWSSY-UHFFFAOYSA-N
  • InChI=1/Cl2S/c1-3-2
    Key: FWMUJAIKEJWSSY-UHFFFAOYAS
  • ClSCl
Properties
SCl2
Molar mass 102.96 g·mol−1
Appearance Cherry-red liquid
Odor Pungent
Density 1.621 g/cm3
Melting point −121.0 °C (−185.8 °F; 152.2 K)
Boiling point 59 °C (138 °F; 332 K) (decomposes)
Insoluble, reacts slowly
−49.4·10−6 cm3/mol
1.5570
Structure
C2v
Bent
Hazards
GHS labelling:
GHS05: CorrosiveGHS07: Exclamation markGHS09: Environmental hazard
Danger
H314, H335, H400
P260, P261, P264, P271, P273, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P321, P363, P391, P403+P233, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 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
3
1
1
234 °C (453 °F; 507 K)
Safety data sheet (SDS) ICSC 1661
Related compounds
Related
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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Sulfur dichloride is the

organosulfur
compounds. It is a highly corrosive and toxic substance, and it reacts on contact with water to form chlorine-containing acids.

Chlorination of sulfur

SCl2 is produced by the chlorination of either elemental sulfur or disulfur dichloride.[1] The process occurs in a series of steps, some of which are:

S8 + 4 Cl2 → 4 S2Cl2; ΔH = −58.2 kJ/mol
S2Cl2 + Cl2 ↔ 2 SCl2; ΔH = −40.6 kJ/mol

The addition of

SCl4
, but this species is unstable at near room temperature. It is likely that several SnCl2 exist where n > 2.

ampules
which develop a slight positive pressure of chlorine, halting the decomposition.

Use of SCl2 in chemical synthesis

SCl2 is used in

thioether[2] A well tested method for the production of the mustard gas bis(2-chloroethyl)sulfide, is the addition of ethylene to sulfur dichloride:[3]

SCl2 + 2 C2H4 → (ClC2H4)2S

SCl2 is also a precursor to several inorganic sulfur compounds. Treatment with fluoride salts gives SF4 via the decomposition of the intermediate sulfur difluoride. With H2S, SCl2 reacts to give "lower" sulfanes such as S3H2.

Reaction with ammonia affords sulfur nitrides related to S4N4. Treatment of SCl2 with primary amines gives sulfur diimides. One example is di-t-butylsulfurdiimide.[4]

Safety considerations

SCl2

hydrolyzes with release of HCl. Old samples contain Cl2.[citation needed
]

References

  1. ^ F. Fehér "Dichloromonosulfane" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 370.
  2. ^ Bishop, Roger (1992). "9-Thiabicyclo[3.3.1]nonane-2,6-dione". Organic Syntheses. 70: 120; Collected Volumes, vol. 9, p. 692.
  3. .
  4. .