Thionyl bromide

Orange yellow liquid

Liquid

2,683 g · cm -3 ( 25 ° C)

-52 ° C

• 48 ° C (27 hPa)
• 138 ° C

13 hPa ( 31 ° C)

• Hydrolysis in water
• Soluble in carbon disulfide, benzene, trichloromethane and tetrachloromethane.

1.675 (20 ° C)

Risk

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Thionyl is a chemical compound selected from the group consisting of thionyl halides. It is the dibromide of sulfurous acid.

Production and representation

Thionyl bromide can be obtained by reaction of thionyl chloride with hydrogen bromide or potassium bromide.

Also possible is the preparation by reaction of sulfur dioxide with bromine in the presence of phosphorus trichloride.

Properties

Thionyl bromide is an orange-yellow liquid, which slowly decomposes on standing in sulfur dioxide, bromine and Dischwefeldibromid, with simultaneous discoloration to red. It is very sensitive to moisture and low temperature resistant. It hydrolyzed with water to form hydrogen bromide and sulfur dioxide.

The connection is established with pyramidal sulfur at the apex of the pyramid.

Use

Thionyl bromide may be used for the direct bromination of primary alcohols in the fluorous phase.