Nitrosylsulfuric acid
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Nitrosylsulfuric acid | |
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Image:Nitrosylsulfuric acid.jpg | |
General | |
Systematic name | Nitrosylsulfuric acid |
Other names | Nitrosonium bisulfate |
Molecular formula | HNO5S |
SMILES | ? |
Molar mass | 127.08 g/mol |
Appearance | pale yellow crystals |
CAS number | [7782-78-7] |
Properties | |
Density and phase | 1.612 g/mL in 40% sulfuric acid soln |
Solubility in water | ? g/100 ml (?°C) |
Melting point | 70 °C |
Boiling point | decomposes |
Basicity (pKb) | ? |
Structure | |
Crystal structure | ? |
Hazards | |
MSDS | External MSDS |
Main hazards | oxidizer |
NFPA 704 | |
R/S statement | R: ? S: ? |
RTECS number | ? |
Supplementary data page | |
Structure and properties |
n, εr, etc. |
Thermodynamic data |
Phase behaviour Solid, liquid, gas |
Spectral data | UV, IR, NMR, MS |
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 |
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 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).