Tetrabutylammonium bromide

Tetrabutylammonium bromide (TBAB) is a quaternary ammonium salt with a bromide commonly used as a phase transfer catalyst.[2] It is used to prepare many other tetrabutylammonium salts by salt metathesis reactions. The anhydrous form is a white solid.[3]

"TBAB" redirects here. For t-butylamine borane, see borane tert-butylamine complex.
Tetra-n-butylammonium bromide
Names
Preferred IUPAC name
N,N,N-Tributylbutan-1-aminium bromide
Other names
  • Tetra-n-butylammonium bromide
  • TBAB
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.015.182
EC Number
  • 216-699-2
UNII
  • InChI=1S/C16H36N.BrH/c1-5-9-13-17(14-10-6-2,15-11-7-3)16-12-8-4;/h5-16H2,1-4H3;1H/q+1;/p-1 checkY
    Key: JRMUNVKIHCOMHV-UHFFFAOYSA-M checkY
  • InChI=1/C16H36N.BrH/c1-5-9-13-17(14-10-6-2,15-11-7-3)16-12-8-4;/h5-16H2,1-4H3;1H/q+1;/p-1
    Key: JRMUNVKIHCOMHV-REWHXWOFAC
  • [Br-].CCCC[N+](CCCC)(CCCC)CCCC
Properties
C16H36BrN
Molar mass 322.368 g/mol
Appearance White solid
Melting point 103 °C (217 °F; 376 K) Decomposes at 133C[1]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Harmful
GHS labelling:
GHS07: Exclamation markGHS09: Environmental hazard
Warning
H302, H315, H319, H335, H411, H412
P261, P264, P270, P271, P273, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P312, P321, P330, P332+P313, P337+P313, P362, P391, P403+P233, P405, P501
Related compounds
Other anions
 Tetrabutylammonium tribromide, Tetra-n-butylammonium fluoride, Tetrabutylammonium chloride, Tetra-n-butylammonium iodide, Tetrabutylammonium hydroxide
Other cations
 Tetramethylammonium bromide, Tetraethylammonium bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)
Infobox references

In addition to being cheap, tetrabutylammonium bromide is also environmentally friendly, has a greater degree of selectivity, is operationally simple, non-corrosive, and can be recycled easily as well.[4]

Preparation and reactions

Tetrabutylammonium bromide can be prepared by the alkylation of tributylamine with 1-bromobutane.[3]

Tetrabutylammonium bromide is used to prepare other salts of the tetrabutylammonium cation by salt metathesis reactions.[5]

It serves as a source of bromide ions for substitution reactions. It is one of a commonly-used phase transfer catalyst. As its melting point is just over 100 °C and decreases in the presence of other reagents, it can be considered an ionic liquid.[3]

Role in semi-clathrate formation

TBAB is being extensively studied as a thermodynamic promoter in the formation of semi-clathrate hydrates which greatly brings down the pressure - temperature requirement for forming gas hydrates.

See also

References
  1. Applied Catalysis A: General 241 (2003) 227–233
  2. Henry J. Ledon (1988). "Diazo transfer by means of phase-transfer catalysis: di-tert-butyl diazomalonate". Organic Syntheses.; Collective Volume, vol. 6, p. 414
  3. Charette, André B.; Chinchilla, Rafael; Nájera, Carmen (2007). "Tetrabutylammonium Bromide". In Paquette, Leo A. (ed.). Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rt011.pub2. ISBN 978-0471936237.
  4. Chary, M.V.; Keerthysri, N.C.; Vupallapati, S.V.N.; Lingaiah, N.; Kantevari, S. (2008). "Tetrabutylammonium bromide (TBAB) in isopropanol: An efficient, novel, neutral and recyclable catalytic system for the synthesis of 2,4,5-trisubstituted imidazoles". Catal. Commun. 9: 2013–2017.
  5. Klemperer, W. G. (1990). "Tetrabutylammonium Isopolyoxometalates". Inorganic Syntheses. Inorganic Syntheses. Vol. 27. p. 74–85. doi:10.1002/9780470132586.ch15. ISBN 9780470132586., Bojes, J.; Chivers, T.; Drummond, I. (1978). "Heptathiazocine(Heptasulfurimide) and Tetrabutylammonium Tetrathionitrate". Inorganic Syntheses. Inorganic Syntheses. Vol. 18. p. 203–206. doi:10.1002/9780470132494.ch36. ISBN 9780470132494., Ceriotti, A.; Longoni, G.; Marchionna, M. (1989). Bis(Tetrabutylammonium) Hexa-μ-Carbonyl-Hexacarbonylhexaplatinate(2−), [N(C4H9)4]2[Pt6(CO)6(μ-CO)6]. Inorganic Syntheses. Vol. 26. p. 316–319. doi:10.1002/9780470132579.ch57.;Christou, George; Garner, C. David; Balasubramaniam, A.; Ridge, Brian; Rydon, H. N. (1982). "9. Tetranuclear Iron-Sulfur and Iron-Selenium Clusters". Tetranuclear Iron-Sulfur and Iron-Selenium Clusters. Inorganic Syntheses. Vol. 21. p. 33–37. doi:10.1002/9780470132524.ch9. ISBN 9780470132524..
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