Nomenclature
CAS number: 7791-25-5
Cl
2O
2S; mol wt 134.97.
Cl 52.53%, O 23.71%, S 23.76%.
SO
2Cl
2.
Description and references
Prepd by passing a mixture of dry sulfur dioxide
and chlorine through activated charcoal (other catalysts, such as
camphor, can be used): Danneel, Angew. Chem. 39, 1553 (1926); Durrans, J.
Soc. Chem. Ind. 45, 347 (1926); Meyer, Angew. Chem. 44, 41 (1931); Danneel,
Hesse, Z. Anorg. Allg. Chem. 212, 214 (1933); Allen, Maxson, Inorg.
Synth. 1, 114 (1939).
Properties
Colorless, mobile liquid, very pungent odor. Even the vapors are corrosive to human skin and mucous
membranes. Turns yellow upon prolonged standing because
of slight dissociation into SO2 and Cl2. d420 1.6674. d40 1.7045. mp 54.1° (also given as 46°). bp 69.3°. nD20 1.4437. Dipole moment 1.86. Trouton constant 20.7. Slowly dec
by water, forming H2SO4 and HCl. With ice-cold
water it forms a hydrate, SO2Cl2.15H2O, resembling camphor in appearance. Violent reaction on contact
with alkalies. Miscible with benzene, toluene, ether, glacial acetic
acid, other organic solvents.Use
Chlorinating and sulfonating or chlorosulfonating
agent in organic syntheses, e.g., in the manufacture of chlorophenol
and chlorothymol. Has been used in war gas formulations.