- Nitrosyl chloride
Nitrosyl chloride Identifiers CAS number PubChem ChemSpider EC number UN number 1069 MeSH RTECS number QZ7883000 Jmol-3D images Image 1 Properties Molecular formula ClNO Molar mass 65.46 g/mol Appearance yellow gas, red liquid Density 1.273 g/cm3 (liquid, -12 °C)
2.872 g/L (gas)
Solubility in water decomposes Solubility in chlorocarbons soluble Structure Molecular shape sp2 at N Dipole moment 1.90 D Hazards MSDS ICSC 1580 EU Index Not listed Main hazards Highly toxic NFPA 704 Related compounds Other anions Nitrosyl fluoride
Other cations Thionyl chloride Related compounds Nitric oxide
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Nitrosyl chloride is the chemical compound NOCl. It is a yellow gas that is most commonly encountered as a decomposition product of aqua regia, a mixture of hydrochloric acid and nitric acid. The related nitrosyl halides nitrosyl fluoride, NOF, and nitrosyl bromide, NOBr, are also known.
Structure and synthesis
- HCl + NOHSO4 → NOCl + H2SO4
It also arises from the combination of hydrochloric and nitric acids according to the following reaction:
- HNO3 + 3 HCl → Cl2 + 2 H2O + NOCl
- NOCl reacts with halide acceptors to give the nitrosyl cation, [NO]+. This species is available as NOBF4.
- NOCl reacts with water to release HCl.
- Heating NOCl above 100°C gives back Cl2 and NO.
- In organic synthesis, NOCl is often employed. It adds to alkenes to afford α-chloro oximes.
- NOCl photolyses to NO and a Cl radical.
NOCl is very toxic and irritating to the lungs, eyes and skin.
- ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
- ^ L. J. Beckham, W. A. Fessler, M. A. Kise (1951). "Nitrosyl Chloride". Chemical Reviews 48 (3): 319–396. doi:10.1021/cr60151a001.
- ^ Edmund Davy (1830 - 1837). Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London, Vol. 3.. JSTOR. pp. 27–29. JSTOR 110250.
- ^ Ohno, M,; Naruse, N.; Terasawa, I. (1973), "7-cyanoheptanal", Org. Synth., http://www.orgsyn.org/orgsyn/orgsyn/prepContent.asp?prep=cv5p0266 ; Coll. Vol. 5: 266
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Look at other dictionaries:
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