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Nitrosylsulfuric acid
Introduction
Nitrosylsulfuric acid is the chemical compound with the formula NOHSO4.
This salt is a source of the NO+ ion, It can also be viewed as the mixed acid anhydride of sulfuric acid and nitrous acid:
- HNO2 + H2SO4 → NOHSO4 +H2O
NOHSO4 is useful in organic chemistry to prepare diazonium salts from amines. A typical procedure entails dissolving sodium nitrite in concentrated sulfuric acid in an ice bath.[1][2]
Related NO-delivery reagents include nitrosyl fluoroborate, [NO]BF4, and nitrosyl chloride.
References
- ↑ “Hodgson, H, H.; Mahadevan, A. P. Ward, E. R. “1,4-Dinitronaphthalene” Organic Syntheses, Collected Volume 3, p.341 (1955)(diazodization followed by treatment with nitrite).
- ↑ Sandin, R. B.; Cairns, T. L. “1,2,3-Triiodo-5-nitrobenzene” Organic Syntheses, Coll. Vol. 2, p.604 (1943); Vol. 19, p.81 (1939). (diazodization followed by treatment with iodide).