Synthesis and Reactions
A typical procedure entails dissolving sodium nitrite in concentrated sulfuric acid in an ice bath:
- HNO2 + H2SO4 → NOHSO4 +H2O
The molecule can also be viewed as the mixed acid anhydride of sulfuric acid and nitrous acid. Alternatively, it can be prepared by the reaction of nitric acid and sulfur dioxide.
NOHSO4 is useful in organic chemistry to prepare diazonium salts from amines. Related NO-delivery reagents include nitrosonium tetrafluoroborate (BF4) and nitrosyl chloride.
Read more about this topic: Nitrosylsulfuric Acid
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