Thiocyanic acid
Appearance
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Names | |
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Other names
Hydrogen thiocyanate; Sulfocyanic acid; Sulfocyanide
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Identifiers | |
3D model (JSmol)
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ECHA InfoCard | 100.006.672 |
PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
CHNS | |
Molar mass | 59.09 g·mol−1 |
Miscible | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Thiocyanic acid is a chemical compound with the formula HSCN that exists as a mixture with the isomeric compound isothiocyanic acid (HNCS).[2] It is the sulfur analog of cyanic acid (HOCN).
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.[3]
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.
- ^ Holleman, A. F.; Wiberg, E. Inorganic Chemistry Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
- ^ Wierzejewska, M.; Mielke, Z. (2001). "Photolysis of Isothiocyanic Acid HNCS in Low-Temperature Matrices. Infrared Detection of HSCN and HSNC Isomers". Chemical Physics Letters. 349: 227–234.
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