Tris(4-bromophenyl)ammoniumyl hexachloroantimonate is the

organic compound Some chemical authorities define an organic compound as a chemical compound that contains a carbon–hydrogen or carbon–carbon bond; others consider an organic compound to be any chemical compound that contains carbon. For example, carbon-co ...

with the formula 4-BrC₆H₄)₃NbCl₆. Commonly known as magic blue, it is the

hexachloroantimonate Antimony pentachloride is a chemical compound with the formula SbCl5. It is a colourless oil, but typical samples are yellowish due to dissolved chlorine. Owing to its tendency to hydrolyse to hydrochloric acid, SbCl5 is a highly corrosive subst ...

salt of an amine

radical cation Radical cations are denoted M^. Salts of these species have been isolated in the cases of dibenzocyclooctatetraene, various tertiary amines, and some polymethylated derivatives of azulene. Radical cations, like radical anions, have one unpaire ...

. It is a blue solid that reacts with many solvents but is soluble in

acetonitrile Acetonitrile, often abbreviated MeCN (methyl cyanide), is the chemical compound with the formula and structure . This colourless liquid is the simplest organic nitrile (hydrogen cyanide is a simpler nitrile, but the cyanide anion is not class ...

. The compound is a popular oxidizing agent in organic and

organometallic chemistry Organometallic chemistry is the study of organometallic compounds, chemical compounds containing at least one chemical bond between a carbon atom of an organic molecule and a metal, including alkali, alkaline earth, and transition metals, and so ...

, with a reduction potential of 0.67 V versus

ferrocene Ferrocene is an organometallic chemistry, organometallic compound with the formula . The molecule is a Cyclopentadienyl complex, complex consisting of two Cyclopentadienyl anion, cyclopentadienyl rings sandwiching a central iron atom. It is an o ...

/ferrocenium (

solution) or 0.70 V versus

/ferrocenium (

dichloromethane Dichloromethane (DCM, methylene chloride, or methylene bichloride) is an organochlorine compound with the formula . This colorless, volatile liquid with a chloroform-like, sweet odor is widely used as a solvent. Although it is not miscible with ...

solution). The structure of the cation consists of a three-bladed propeller structure with a planar amine. It is nearly identical to the parent

triphenylamine Triphenylamine is an organic compound with formula (C6H5)3N. In contrast to most amines, triphenylamine is nonbasic. At room temperature it appears as a colorless crystalline solid, with monoclinic structure. It is well miscible in diethyl ether a ...

. The

weakly coordinating anion Anions that interact weakly with cations are termed non-coordinating anions, although a more accurate term is weakly coordinating anion. Non-coordinating anions are useful in studying the reactivity of electrophilic cations. They are commonly found ...

is , which is octahedral.

Related compounds

*Magic green, tris(2,4-dibromophenyl)ammoniumyl hexachloroantimonate,

References

{{reflist Ammonium compounds Free radicals 4-Bromophenyl compounds Antimony(V) compounds Oxidizing agents Chlorometallates