2,4-DINITROBENZENESULFENYL CHLORIDE Chemical Properties

Melting point:

94-97 °C(lit.)

Boiling point:

430.1±35.0 °C(Predicted)

Density 

1.700 (estimate)

refractive index 

1.6000 (estimate)

storage temp. 

2-8°C

solubility 

benzene: soluble

form 

solid

color 

Light orange to Yellow to Green

Merck 

14,3274

BRN 

405600

CAS DataBase Reference

528-76-7(CAS DataBase Reference)

EPA Substance Registry System

Benzenesulfenyl chloride, 2,4-dinitro- (528-76-7)

Safety Information

Hazard Codes 

C

Risk Statements 

34-37

Safety Statements 

26-36/37/39-45

RIDADR 

UN 3261 8/PG 2

WGK Germany 

3

F 

8-9-19-21

HS Code 

2930.90.2900

HazardClass 

8

PackingGroup 

III

MSDS

• Language:English Provider:SigmaAldrich

2,4-DINITROBENZENESULFENYL CHLORIDE Usage And Synthesis

Uses

2,4-Dinitrobenzenesulfenyl chloride was used in preparation of chlorine and bromine biphenyls.

Preparation

CAUTION: This reaction should be carried out in a hood behind a safety shield. The product decomposes explosively if heated above 90-100°C .
To a 500-ml, three-necked flask equipped with a mechanical stirrer, distillation column, and distillation head is added 100 gm (0.25 mole) of dry 2,4-dinitrophenyl disulfide and 250 ml of ethylene chloride. The contents are heated with an oil bath at 125°C until 30-40 ml of the solvent is collected by distillation. The contents are cooled and the distillation head replaced by a gas inlet and exit tube connected to an alkali trap. Then 0.15 gm (0.002 mole) of Merck "Iron by Hydrogen" powder is added as a catalyst [51a-c], and dry chlorine gas is slowly bubbled into the reaction. In a few minutes, the reaction warms up, and the flask is surrounded with a 20°C water bath. The chlorine gas is bubbled in at such a rate that 18 gm (0.25 mole) is added over a 1-1½-hr period. After this time, the suspended disulfide should gradually disappear, and a clear, amber-red solution results. The flow of chlorine gas is stopped, the solution stirred for 1 hr, filtered through diatomaceous earth, the filtrate aspirated to remove excess chlorine, and then 400 ml of anhydrous ether is added. Within ½ hr, most of the product crystallizes by cooling the flask in an ice-salt-water bath for 3-4 hr. The product is filtered, washed with 100 ml of cold ether, and then dried to afford 70 gm (60%) of brilliant yellow needles, m.p. 95-95.5°C.

Synthesis Reference(s)

Journal of the American Chemical Society, 72, p. 1796, 1950 DOI: 10.1021/ja01160a108

General Description

2,4-Dinitrobenzenesulfenyl chloride undergoes addition reactions with transannularly substituted cycloalkenes and norbornenes. 2,4-Dinitrobenzenesulfenyl chloride can convert allylic alcohols to dienes by 1,4-elimination.

Purification Methods

Crystallise the sulfenyl chloride from CCl4. [Beilstein 6 II 316.]

2,4-DINITROBENZENESULFENYL CHLORIDE(528-76-7)Related Product Information

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