Thiocyanic acid
From Infogalactic: the planetary knowledge core
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Names | |||
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IUPAC name
Nitridosulfanidocarbon[2]
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Other names
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Identifiers | |||
463-56-9 | |||
3DMet | B00344 | ||
ChEBI | CHEBI:29200 | ||
ChEMBL | ChEMBL84336 | ||
ChemSpider | 760 | ||
EC Number | 207-337-4 | ||
25178 | |||
Jmol 3D model | Interactive image | ||
KEGG | C01755 | ||
MeSH | thiocyanic+acid | ||
PubChem | 781 | ||
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Properties | |||
CHNS | |||
Molar mass | 59.09 g·mol−1 | ||
Appearance | colorless, oily liquid | ||
Odor | pungent | ||
Density | 2.04 g/cm3 | ||
Melting point | 5 °C (41 °F; 278 K) | ||
Miscible | |||
Solubility | soluble in ethanol, diethyl ether | ||
log P | 0.429 | ||
Acidity (pKa) | 0.926 | ||
Basicity (pKb) | 13.071 | ||
Vapor pressure | {{{value}}} | ||
Related compounds | |||
Related alkanenitriles
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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verify (what is ?) | |||
Infobox references | |||
Thiocyanic acid is a chemical compound with the formula HSCN which exists as a tautomer with isothiocyanic acid (HNCS).[3] The iso- form tends to dominate with the material being about 95% isothiocyanic acid in the vapor phase.[4]
It is a weak acid, bordering on strong, with a pKa of 1.1 at 20 °C and extrapolated to zero ionic strength.[5]
HSCN is predicted to have a triple bond between carbon and nitrogen. It has been observed spectroscopically but has not been isolated as a pure substance.[6]
The salts and esters of thiocyanic acid are known as thiocyanates. The salts are composed of the thiocyanate ion (−SCN) and a suitable metal cation (e.g., potassium thiocyanate, KSCN). The esters of thiocyanic acid have the general structure R-SCN.
References
- ↑ Merck Index, 11th Edition, 9257.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Holleman, A. F.; Wiberg, E. Inorganic Chemistry Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Martell, A. E.; Smith, R. M.; Motelaitis, R. J. NIST Database 46 National Institute of Standards and Technology: Gaithersburg, MD, 2001.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.