2-Chlorobutane

• 2 -butyl chloride
• Sec -butyl chloride
• S- butyl chloride

• 78-86-4
• 22157-31-9 ( R)-isomer
• 22156-91-8 (S)- isomer

Volatile, colorless liquid with a characteristic odor

Liquid

0.87 g · cm -3

-140 ° C

68 ° C

145 hPa ( 20 ° C)

• Poorly in water (1 g · l-1 at 25 ° C)
• Miscible with alcohol

1.3965 (20 ° C)

Risk

17.5 g · kg -1 ( LD50, rat, oral)

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2- chlorobutane, is a chemical compound selected from the group of the saturated aliphatic halogenated hydrocarbons, and organic chlorine compounds. It occurs in two stereoisomeric forms ( S)-2 -chlorobutane and (R )-2- chlorobutane.

Production and representation

2 -chlorobutane may be prepared by reaction of 2 -butanol, and hydrochloric acid (in addition to zinc chloride) or prepared by the reaction of 2-butene with hydrochloric acid.

A technical synthesis is carried out by thermal chlorination of butane over alumina at 200 ° C. This gives rise to the same extent 1-chlorobutane and in small proportions Dichlorbutane. This synthesis is also possible photochemically at 15-20 ° C, the product distribution is similar. A further possibility is the reaction of 2 -butanol with hydrogen chloride at 100 ° C.

Use

2 -chlorobutane being used as an intermediate for the synthesis of perfumes, pesticides, drugs and other chemicals.

Safety

The vapors of 2- chlorobutane can form (about -21 ° C, ignition temperature 460 ° C flash point) with air to form an explosive mixture.