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Common salts include the colourless salts potassium thiocyanate and sodium thiocyanate. Mercury(II) thiocyanate was formerly used in pyrotechnics. Thiocyanate is analogous to the cyanate ion, [OCN] −, wherein oxygen is replaced by sulfur. [SCN] − is one of the pseudohalides, due to the similarity of its reactions to that of halide ions.
Aryl thiocyanates are traditionally produced by the Sandmeyer reaction, which involves combining copper(I) thiocyanate and diazonium salts: [3] [ArN 2]BF 4 + CuSCN → ArSCN + CuBF 4 + N 2. Some arylthiocyanates can also often be obtained by thiocyanogenation, i.e. the reaction of thiocyanogen. This reaction is favored for electron-rich ...
Sodium thiocyanate (sometimes called sodium sulphocyanide) is the chemical compound with the formula NaSCN. This colorless deliquescent salt is one of the main sources of the thiocyanate anion . As such, it is used as a precursor for the synthesis of pharmaceuticals and other specialty chemicals . [ 2 ]
The salts are composed of the thiocyanate ion ([SCN] −) and a suitable cation (e.g., ammonium thiocyanate, [NH 4] + [SCN] −). Isothiocyanic acid forms isothiocyanates R−N=C=S, where R stands for an organyl group. Thiocyanuric acid is a stable trimer of thiocyanic acid.
Strontium thiocyanate refers to the salt Sr(SCN) 2.It is a colorless solid. According to X-ray crystallography, it is a coordination polymer.The Sr 2+ ions are each coordinated to eight thiocyanate anions in a distorted square antiprismatic molecular geometry where each square face contains two adjacent S atoms and two adjacent N atoms.
Thiocyanate complexes are not widely used commercially. Possibly the oldest application of thiocyanate complexes was the use of thiocyanate as a test for ferric ions in aqueous solution. [15] The reverse was also used: testing for the presence of thiocyanate by the addition of ferric salts. The 1:1 complex of thiocyanate and iron is deeply red.
Calcium thiocyanate refers to the salt Cs(SCN) 2. It is a colorless solid. According to X-ray crystallography, it is a coordination polymer. The Ca 2+ ions are each bonded to eight thiocyanate anions, with four Ca-S and four Ca-N bonds. The motif is reminiscent of the fluorite structure. [1]
Potassium thiocyanate is the chemical compound with the molecular formula KSCN. It is an important salt of the thiocyanate anion , one of the pseudohalides . The compound has a low melting point relative to most other inorganic salts.