Trisha Shetty (Editor)

Nitrosylsulfuric acid

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Related compounds
  
NOBF4

Formula
  
HNO5S

Melting point
  
73.5 °C

Pubchem
  
82157

Molar mass
  
127.08 g/mol

Density
  
1.61 g/cm³

Appearance
  
pale yellow crystals

Nitrosylsulfuric acid httpsuploadwikimediaorgwikipediacommonsthu

Attempts to make nitrosylsulfuric acid


Nitrosylsulfuric acid is the chemical compound with the formula NOHSO4. It is a colourless solid that is used industrially in the production of caprolactam, and was formerly part of the lead chamber process for producing sulfuric acid.

Contents

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 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 ([NO]BF4) and nitrosyl chloride.

References

Nitrosylsulfuric acid Wikipedia
(Text) CC BY-SA


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