Puneet Varma (Editor)

Thiocyanic acid

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3DMet
  
B00344

Density
  
2.04 g/cm³

Formula
  
CHNS

Appearance
  
colorless, oily liquid

Thiocyanic acid httpsiytimgcomvibxcl4htRokMmaxresdefaultjpg

Related alkanenitriles
  
Hydrogen cyanide Cyanogen iodide Cyanogen bromide Cyanogen chloride Cyanogen fluoride Acetonitrile Aminoacetonitrile Glycolonitrile Cyanogen

Hscn lewis structure thiocyanic acid


Thiocyanic acid is a chemical compound with the formula HSCN which exists as a tautomer with isothiocyanic acid (HNCS). The iso- form tends to dominate with the material being about 95% isothiocyanic acid in the vapor phase.

Contents

It is a weak acid, bordering on strong, with a pKa of 1.1 at 20 °C and extrapolated to zero ionic strength.

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.

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.

Thiocyanic acid


References

Thiocyanic acid Wikipedia
(Text) CC BY-SA