Nitrosylsulfuric acid
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| Nitrosylsulfuric acid | |
|---|---|
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| IUPAC name | Nitrosylsulfuric acid |
| Other names | Nitrosonium bisulfate |
| Identifiers | |
| CAS number | [7782-78-7] |
| Properties | |
| Molecular formula | HNO5S |
| Molar mass | 127.08 g/mol |
| Appearance | pale yellow crystals |
| Density | 1.612 g/mL in 40% sulfuric acid soln |
| Melting point |
70 °C |
| Boiling point |
decomposes |
| Solubility in water | ? g/100 ml (?°C) |
| Hazards | |
| Main hazards | oxidizer |
| Related compounds | |
| Other anions | NOCl |
| Other cations | NaHSO4 |
| Related compounds | NOBF4 |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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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.
[edit] 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).
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