Tris(4-bromophenyl)ammoniumyl hexachloroantimonate

Tris(4-bromophenyl)ammoniumyl hexachloroantimonate
Identifiers
CAS Number	24964-91-8 salt; 37881-41-7 cation;
3D model (JSmol)	Interactive image;
ChemSpider	21493919;
PubChem CID	16688313;
	InChI InChI=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 Key: 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;
Properties
Chemical formula	C18H12Br3Cl6NSb
Molar mass	816.47 g·mol−1
Appearance	blue solid
Melting point	141 to 142 °C (286 to 288 °F; 414 to 415 K)
Solubility in water	acetonitrile
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	Infobox references

Tris(4-bromophenyl)ammoniumyl hexachloroantimonate is the organic compound with the formula [(4-BrC₆H₄)₃N]SbCl₆.[1] 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 vs. ferrocene/ferrocenium (MeCN solution) or 0.70 V vs. ferrocene/ferrocenium (dichloromethane solution).[2]

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 SbCl₆⁻, which is octahedral.[3]

References

Earle, Martyn J.; Vibert, Aude; Jahn, Ullrich (2011). "Tris(4-bromophenyl)aminium Hexachloroantimonate". Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rt397.pub2. ISBN 978-0471936237.
Connelly, N. G.; Geiger, W. E. (1996). "Chemical Redox Agents for Organometallic Chemistry". Chem. Rev. 96 (2): 877–910. doi:10.1021/cr940053x. PMID 11848774.
Quiroz-Guzman, Mauricio; Brown, Seth N. (2010). "Tris(4-bromophenyl)aminium hexachloridoantimonate ('Magic Blue'): A strong oxidant with low inner-sphere reorganization". Acta Crystallographica Section C. 66 (7): m171. doi:10.1107/S0108270110019748.CS1 maint: multiple names: authors list (link)

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[1] Earle, Martyn J.; Vibert, Aude; Jahn, Ullrich (2011). "Tris(4-bromophenyl)aminium Hexachloroantimonate". Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rt397.pub2. ISBN 978-0471936237.

[Geiger-2] Connelly, N. G.; Geiger, W. E. (1996). "Chemical Redox Agents for Organometallic Chemistry". Chem. Rev. 96 (2): 877–910. doi:10.1021/cr940053x. PMID 11848774.

[3] Quiroz-Guzman, Mauricio; Brown, Seth N. (2010). "Tris(4-bromophenyl)aminium hexachloridoantimonate ('Magic Blue'): A strong oxidant with low inner-sphere reorganization". Acta Crystallographica Section C. 66 (7): m171. doi:10.1107/S0108270110019748.CS1 maint: multiple names: authors list (link)