Sulfamic Acid → Bis(chlorosulfonyl)amine

Participants

Reaction Steps

The reaction of sulphamic acid with chlorosulphonic acid and thionyl chloride gives HN(SO2Cl)2. This reaction also provides by-products including sulphur dioxide, sulphuric acid and hydrochloric acid. Sulphur dioxide is generated from the reaction of thionyl chloride with sulphamic acid. Thus generation of sulphur dioxide indicates continuation of the reaction. Thus the heating is continued until generation of sulphur dioxide is ceased.

Provenance & Evidence