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|Verifiedfields = changed|Watchedfields = changed|verifiedrevid = 470607041|Reference = <ref>''[[Merck Index]]'', 11th Edition, '''9257'''.</ref>|ImageFileL1 = Thiocyanic acid.png|ImageFileL1_Ref = {{chemboximage|correct|??}}|ImageNameL1 = Skeletal formula of thiocyanic acid|ImageFileR1 = Thiocyansäure.png|ImageFileR1_Ref = {{chemboximage|correct|??}}|ImageNameR1 = Skeletal formula of thiocyanic acid with the explicit hydrogen added|ImageFile2 = Thiocyanic-acid-3D-vdW.png|ImageFile2_Ref = {{chemboximage|correct|??}}|ImageSize2 = 100|ImageName2 = Spacefill model of thiocyanic acid|IUPACName = Nitridosulfanidocarbon<ref>{{Cite web|title=thiocyanic acid (CHEBI:29200)|url=https://www.ebi.ac.uk/chebi/searchId.do?chebiId=29200|work=Chemical Entities of Biological Interest|publisher=European Bioinformatics Institute|accessdate=5 June 2012|location=USA|date=18 October 2009|at=Main.}}</ref>|OtherNames = {{Unbulleted list|Hydrogen thiocyanate{{Citation needed|date=June 2012}}|Sulfocyanic acid{{Citation needed|date=June 2012}}|Sulfocyanide{{Citation needed|date=June 2012}} |
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| verifiedrevid = 470607041 |
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| Reference = <ref>''[[Merck Index]]'', 11th Edition, '''9257'''.</ref> |
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| ImageFileL1 = Thiocyanic acid.png |
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| ImageFileL1_Ref = {{chemboximage|correct|??}} |
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| ImageNameL1 = Skeletal formula of thiocyanic acid |
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| ImageFileR1 = Thiocyansäure.png |
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| ImageFileR1_Ref = {{chemboximage|correct|??}} |
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| ImageNameR1 = Skeletal formula of thiocyanic acid with the explicit hydrogen added |
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| ImageFile2 = Thiocyanic-acid-3D-vdW.png |
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| ImageFile2_Ref = {{chemboximage|correct|??}} |
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| ImageSize2 = 100 |
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| ImageName2 = Spacefill model of thiocyanic acid |
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| IUPACName = Nitridosulfanidocarbon<ref>{{Cite web|title=thiocyanic acid (CHEBI:29200)|url=https://www.ebi.ac.uk/chebi/searchId.do?chebiId=29200|work=Chemical Entities of Biological Interest|publisher=European Bioinformatics Institute|accessdate=5 June 2012|location=USA|date=18 October 2009|at=Main.}}</ref> |
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| OtherNames = {{Unbulleted list|Hydrogen thiocyanate{{Citation needed|date=June 2012}}|Sulfocyanic acid{{Citation needed|date=June 2012}}|Sulfocyanide{{Citation needed|date=June 2012}} |
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}} |
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| CASNo = 463-56-9 |
| CASNo = 463-56-9 |
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| CASNo_Ref = {{cascite|correct|CAS}} |
| CASNo_Ref = {{cascite|correct|CAS}} |
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| StdInChIKey = ZMZDMBWJUHKJPS-UHFFFAOYSA-N |
| StdInChIKey = ZMZDMBWJUHKJPS-UHFFFAOYSA-N |
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| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} |
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} |
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}} |
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| C = 1 |
| C = 1 |
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| H = 1 |
| H = 1 |
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| Odor = pungent |
| Odor = pungent |
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| Solubility = Miscible |
| Solubility = Miscible |
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| SolubleOther = soluble in [[ethanol]], [[diethyl ether]] |
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| LogP = 0.429 |
| LogP = 0.429 |
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| pKa = 0.926 |
| pKa = 0.926 |
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| Density = 2.04 g/cm<sup>3</sup> |
| Density = 2.04 g/cm<sup>3</sup> |
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| MeltingPtC = 5 |
| MeltingPtC = 5 |
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}} |
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| EUIndex = 615-003-00-8 |
| EUIndex = 615-003-00-8 |
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| EUClass = {{Hazchem Xn}} |
| EUClass = {{Hazchem Xn}} |
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| RPhrases = {{R20/21/22}}, {{R32}}, {{R52/53}} |
| RPhrases = {{R20/21/22}}, {{R32}}, {{R52/53}} |
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| SPhrases = {{S2}}, {{S13}} |
| SPhrases = {{S2}}, {{S13}} |
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}} |
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| Function = alkanenitriles |
| Function = alkanenitriles |
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| OtherFunctn = {{Unbulleted list|[[Hydrogen cyanide]]|[[Cyanogen iodide]]|[[Cyanogen bromide]]|[[Cyanogen chloride]]|[[Cyanogen fluoride]]|[[Acetonitrile]]|[[Aminoacetonitrile]]|[[Glycolonitrile]]|[[Cyanogen]]}} |
| OtherFunctn = {{Unbulleted list|[[Hydrogen cyanide]]|[[Cyanogen iodide]]|[[Cyanogen bromide]]|[[Cyanogen chloride]]|[[Cyanogen fluoride]]|[[Acetonitrile]]|[[Aminoacetonitrile]]|[[Glycolonitrile]]|[[Cyanogen]]}} |
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'''Thiocyanic acid''' is a [[chemical compound]] with the formula HSCN that exists as a mixture with the [[isomer]]ic compound isothiocyanic acid (HNCS).<ref>Holleman, A. F.; Wiberg, E. ''Inorganic Chemistry'' Academic Press: San Diego, 2001. ISBN 0-12-352651-5.</ref> It is the sulfur analog of [[cyanic acid]] (HOCN). |
'''Thiocyanic acid''' is a [[chemical compound]] with the formula HSCN that exists as a mixture with the [[isomer]]ic compound isothiocyanic acid (HNCS).<ref>Holleman, A. F.; Wiberg, E. ''Inorganic Chemistry'' Academic Press: San Diego, 2001. ISBN 0-12-352651-5.</ref> It is the sulfur analog of [[cyanic acid]] (HOCN). |
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Revision as of 03:28, 11 July 2013
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Names | |||
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IUPAC name
Nitridosulfanidocarbon[2]
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Other names
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Identifiers | |||
3D model (JSmol)
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3DMet | |||
ChEBI | |||
ChEMBL | |||
ChemSpider | |||
ECHA InfoCard | 100.006.672 | ||
EC Number |
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25178 | |||
KEGG | |||
MeSH | thiocyanic+acid | ||
PubChem CID
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CompTox Dashboard (EPA)
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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 | ||
Related compounds | |||
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).[3] It is the sulfur analog of cyanic acid (HOCN).
It is a weak acid, bordering on strong, with a pKa of 1.1 at 20°C and extrapolated to zero ionic strength.[4]
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.[5]
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.
- ^ "thiocyanic acid (CHEBI:29200)". Chemical Entities of Biological Interest. USA: European Bioinformatics Institute. 18 October 2009. Main. Retrieved 5 June 2012.
- ^ Holleman, A. F.; Wiberg, E. Inorganic Chemistry Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
- ^ Martell, A. E.; Smith, R. M.; Motelaitis, R. J. NIST Database 46 National Institute of Standards and Technology: Gaithersburg, MD, 2001.
- ^ 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. doi:10.1016/S0009-2614(01)01180-0.
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: CS1 maint: multiple names: authors list (link)