The structure and bonding of the thiocyanate ion

Thiocyanate (also known as sulphocyanate or thiocyanide) is the anion, [SCN]⁻. Common compounds include the colourless salts potassium thiocyanate and sodium thiocyanate. Organic compounds containing the functional group SCN are also called thiocyanates. Mercury(II) thiocyanate was formerly used in pyrotechnics. Image File history File links Size of this preview: 800 × 259 pixelsFull resolution (1100 × 356 pixel, file size: 21 KB, MIME type: image/png) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links Size of this preview: 800 × 259 pixelsFull resolution (1100 × 356 pixel, file size: 21 KB, MIME type: image/png) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... See: Thiocyanate Potassium thiocyanate is the chemical compound KSCN. It is an important salt of the thiocyanate anion, one of the pseudohalides. ... R-phrases 20/21/22-32-52/53 S-phrases 13-61 Except where noted otherwise, data are given for materials in their standard state (at 25 Â°C, 100 kPa) Infobox disclaimer and references Sodium thiocyanate is the chemical compound with the formula NaSCN. This colourless deliquescent salt is one... Benzene is the simplest of the arenes, a family of organic compounds An organic compound is any member of a large class of chemical compounds whose molecules contain carbon. ... In organic chemistry, functional groups (or moieties) are specific groups of atoms within molecules, that are responsible for the characteristic chemical reactions of those molecules. ... Mercury(II) thiocyanate (Hg(SCN)2) is a chemical compound. ...

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. Thiocyanate was formerly known as rhodanide (from a Greek word for rose) because of the red colour of its complexes with iron. Thiocyanate is produced by the reaction of elemental sulfur or thiosulfate with cyanide: The cyanate ion is an anion consisting of one oxygen atom, one carbon atom, and one nitrogen atom (OCN−), in that order, and possesses 1 unit of negative charge, borne mainly by the nitrogen atom. ... This article is about the chemical element and its most stable form, or dioxygen. ... This article is about the chemical element. ... Pseudohalogens are binary inorganic compounds of the general form XY, where X is a cyanide, cyanate, thiocyanate etc. ... A halide is a binary compound, of which one part is a halogen atom and the other part is an element or radical that is less electronegative than the halogen, to make a fluoride, chloride, bromide, iodide, or astatide compound. ... For other uses, see Rose (disambiguation). ... General Name, symbol, number iron, Fe, 26 Chemical series transition metals Group, period, block 8, 4, d Appearance lustrous metallic with a grayish tinge Standard atomic weight 55. ... It has been suggested that thiosulfate ion be merged into this article or section. ... This article is about the chemical compound. ...

8 CN⁻ + S₈ → 8 SCN⁻

CN⁻ + S₂O₃^2- → SCN⁻ + SO₃^2-

The latter reaction is catalyzed by the enzyme sulfotransferase known as rhodanase and may be relevant to detoxification of cyanide in the body. SULT2A1 is a gene involved in the sulfation of dehydroepiandrosterone. ... To meet Wikipedias quality standards, this article or section may require cleanup. ...

Organic thiocyanates

Organic and transition metal derivatives of the thiocyanate ion can exist as "linkage isomers." In thiocyanates, the organic group or metal is attached to sulfur: R−S−C≡N has a S-C single bond and a C-N triple bond ^[1]. In isothiocyanates, the substituent is attached to nitrogen: R−N=C=S has a S-C double bond and a C-N double bond Linkage isomerism is a concept in coordination chemistry. ... Isothiocyanate is the chemical group -N=C=S, formed by substituting sulfur for oxygen in the isocyanate group. ...

Phenylthiocyanate and phenylisothiocyanate are linkage isomers and are bonded differently

Organic thiocyanates are hydrolyzed to thiocarbamates in the Riemschneider thiocarbamate synthesis. Image File history File links Size of this preview: 672 × 600 pixelsFull resolution (1100 × 982 pixel, file size: 166 KB, MIME type: image/png) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links Size of this preview: 672 × 600 pixelsFull resolution (1100 × 982 pixel, file size: 166 KB, MIME type: image/png) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Linkage isomerism is a concept in coordination chemistry. ...

Test for iron(III)

If [SCN]⁻ is added to a solution containing iron(III) ions (Fe³⁺), a blood red solution is formed due to the presence of the [Fe(NCS)(H₂O)₅]²⁺.

The blood-red coloured complex pentaaqua(thiocyanato-N)iron(II), [Fe(NCS)(H₂O)₅]²⁺, indicates the presence of Fe³⁺ in solution

Image File history File links Size of this preview: 691 × 599 pixelsFull resolution (1100 × 954 pixel, file size: 208 KB, MIME type: image/png) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links Size of this preview: 691 × 599 pixelsFull resolution (1100 × 954 pixel, file size: 208 KB, MIME type: image/png) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ...

References