Tetrabutylammonium tribromide

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Tetrabutylammonium tribromide
Tetrabutylammonium tribromide.svg
IUPAC name
N,N,N-Tributyl-1-butanaminium tribromide
3D model (JSmol)
ECHA InfoCard 100.132.625
Molar mass 482.18 g·mol−1
Appearance pale orange solid
Melting point 71 to 76 °C (160 to 169 °F; 344 to 349 K) [1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Tetrabutylammonium tribromide is a pale orange solid with the formula [N(C4H9)4]Br3. It is a salt of the lipophilic tetrabutylammonium cation and the linear tribromide anion. The salt is sometimes used as a reagent used in organic synthesis as a conveniently weighable, solid source of bromine.

The compound is prepared by treatment of solid tetrabutylammonium bromide with bromine vapor:[2]

[N(C4H9)4]Br + Br2 → [N(C4H9)4]Br3


  1. ^ Tetrabutylammonium tribromide at Sigma-Aldrich
  2. ^ Alexander I. Popov, Robert E. Buckles "Typical Polyhalogen Complex Salts" Inorganic Syntheses, 1957, volume 5, pp. 176–178. doi:10.1002/9780470132364.ch47