Benzenesulfonyl chloride

Benzenesulfonyl chloride

Names
Preferred IUPAC name Benzenesulfonyl chloride
Identifiers
CAS Number	98-09-9
3D model (Jmol)	Interactive image
ChemSpider	7091
ECHA InfoCard	100.002.397
PubChem	7369
InChI InChI=1S/C6H5ClO2S/c7-10(8,9)6-4-2-1-3-5-6/h1-5H Key: CSKNSYBAZOQPLR-UHFFFAOYSA-N InChI=1/C6H5ClO2S/c7-10(8,9)6-4-2-1-3-5-6/h1-5H Key: CSKNSYBAZOQPLR-UHFFFAOYAR
SMILES C1=CC=C(C=C1)S(=O)(=O)Cl
Properties
Chemical formula	C6H5ClO2S
Molar mass	176.62
Appearance	colourless viscous liquid
Melting point	13 to 14 °C (55 to 57 °F; 286 to 287 K)
Solubility in water	reacts
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Benzenesulfonyl chloride is an organosulfur compound with the formula C₆H₅SO₂Cl. It is a colourless viscous oil that dissolves in organic solvents, but reacts with compounds containing reactive N-H and O-H bonds. It is mainly used to prepare sulfonamides and sulfonate esters by reactions with amines and alcohols, respectively. The closely related compound toluenesulfonyl chloride is often preferred analogue because it is a solid at room temperature and easier to handle.

The compound is prepared by the chlorination of benzenesulfonic acid or its salts with phosphorus oxychloride or, less commonly, by a reaction between benzene and chlorosulfuric acid.

The Hinsberg test for amines involves their reaction with benzenesulfonyl chloride.