tris(4-bromophenyl)ammoniumyl hexachloroantimonate

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| ImageFile = File:MagicBlueStructureBr3.png

| ImageClass = skin-invert-image

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|Section1={{Chembox Identifiers

| CASNo1 = 24964-91-8

| CASNo1_Comment = salt

| CASNo2 = 37881-41-7

| CASNo2_Comment = cation

| PubChem = 16688313

| ChemSpiderID = 21493919

| StdInChI=1S/C18H12Br3N.6ClH.Sb/c19-13-1-7-16(8-2-13)22(17-9-3-14(20)4-10-17)18-11-5-15(21)6-12-18;;;;;;;/h1-12H;6*1H;/q+1;;;;;;;+5/p-6

| StdInChIKey = SDHBPVANTRLAKE-UHFFFAOYSA-H

| SMILES = C1=CC(=CC=C1[N+](C2=CC=C(C=C2)Br)C3=CC=C(C=C3)Br)Br.Cl[Sb-](Cl)(Cl)(Cl)(Cl)Cl

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|Section2={{Chembox Properties

| Formula = {{chem2|[(p\-BrC6H4)3N•]+[SbCl6]-}}

| C=18|H=12|N=1|Br=3|Cl=6|Sb=1

| Appearance = blue solid

| Density =

| MeltingPtC = 141 to 142

| BoilingPt =

| Solubility = acetonitrile}}

|Section3={{Chembox Hazards

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Tris(4-bromophenyl)ammoniumyl hexachloroantimonate is the organic compound with the formula [(4-BrC₆H₄)₃N]SbCl₆.{{cite book|doi=10.1002/047084289X.rt397.pub2|isbn=978-0-471-93623-7|chapter=Tris(4-bromophenyl)aminium Hexachloroantimonate|title=Encyclopedia of Reagents for Organic Synthesis|year=2011|last1=Earle|first1=Martyn J.|last2=Vibert|first2=Aude|last3=Jahn|first3=Ullrich}} Commonly known as magic blue, it is the hexachloroantimonate salt of an amine radical cation. It is a blue solid that reacts with many solvents but is soluble in acetonitrile. The compound is a popular oxidizing agent in organic and organometallic chemistry, with a reduction potential of 0.67 V versus ferrocene/ferrocenium (acetonitrile solution) or 0.70 V versus ferrocene/ferrocenium (dichloromethane solution).{{cite journal|first1=N. G.|last1= Connelly|first2= W. E.|last2= Geiger| title=Chemical Redox Agents for Organometallic Chemistry|journal=Chem. Rev.|year= 1996| volume= 96|issue=2| pages= 877–910| doi=10.1021/cr940053x| pmid=11848774}}

The structure of the cation consists of a three-bladed propeller structure with a planar amine. It is nearly identical to the parent triphenylamine. The weakly coordinating anion is {{chem|SbCl|6|−}}, which is octahedral.

{{cite journal|author = Quiroz-Guzman, Mauricio; Brown, Seth N.|title=Tris(4-bromophenyl)aminium hexachloridoantimonate ('Magic Blue'): A strong oxidant with low inner-sphere reorganization|journal=Acta Crystallographica Section C|volume=66|issue=7|pages=m171–m173|doi=10.1107/S0108270110019748|year=2010|pmid=20603548|bibcode=2010AcCrC..66M.171Q }}