Pyrosulfuryl chloride

Structural formula
General
Surname	Pyrosulfuryl chloride
other names	Disulfuryl chloride
Molecular formula	Cl 2 O 5 S 2
Brief description	colorless liquid with a peculiar smell
External identifiers / databases
CAS number 7791-27-7 PubChem 24649 Wikidata Q15632724
properties
Molar mass	215.03 g mol −1
Physical state	liquid
density	1.84 g cm −3
Melting point	−37 ° C
boiling point	152-153 ° C
Refractive index	1,837
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Pyrosulfuryl chloride is a chemical compound from the group of acid chlorides . It is the anhydride of chlorosulfonic acid .

Extraction and presentation

Pyrosulfuryl chloride can be obtained by reacting sulfur trioxide with carbon tetrachloride .

${\displaystyle \mathrm {2\ SO_{3}+CCl_{4}\longrightarrow S_{2}O_{5}Cl_{2}+COCl_{2}} }$

properties

Pyrosulfuryl chloride is a colorless, easily mobile liquid with a characteristic odor, which faintly smokes in moist air and becomes cloudy with the separation of sulfuric acid . With prolonged boiling or heating to 250 ° C, dissociation occurs into sulfur trioxide, sulfur dioxide and chlorine .

Individual evidence

1. ^ ^{A b} Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 710 ( limited preview in Google Book search).
2. ↑ ^{a b c d e f} Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 389.
3. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.