Tetra-N-butylammonium bromide
- Formula: C16H36BrN
- Molecular weight: 322.368
- IUPAC Standard InChI: 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
- IUPAC Standard InChIKey: JRMUNVKIHCOMHV-UHFFFAOYSA-M
- CAS Registry Number: 1643-19-2
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Tetrabutylammonium bromide; TBAB; 1-Butanaminium, N,N,N-tributyl-, bromide
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Phase change data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tfus | 395. | K | N/A | Burns and Verrall, 1974 | Crystal phase 1 phase; Uncertainty assigned by TRC = 1. K; TRC |
| Tfus | 395. | K | N/A | Coker, Ambrose, et al., 1970 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.5 K; TRC |
Enthalpy of fusion
| ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 16.150 | 395. | Burns and Verrall, 1974, 2 | DH |
Entropy of fusion
| ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 40.89 | 395. | Burns and Verrall, 1974, 2 | DH |
Enthalpy of phase transition
| ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.067 | 293. | crystaline, IV | crystaline, III | Burns and Verrall, 1974, 2 | T = 293 to 295 K. H maximum value.; DH |
| 1.630 | 367. | crystaline, III | crystaline, II | Burns and Verrall, 1974, 2 | T = 366.0 to 369 K.; DH |
| 0.335 | 383. | crystaline, II | crystaline, I | Burns and Verrall, 1974, 2 | T = 382 to 383.5 K.; DH |
Entropy of phase transition
| ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.2 | 293. | crystaline, IV | crystaline, III | Burns and Verrall, 1974, 2 | T; DH |
| 4.4 | 367. | crystaline, III | crystaline, II | Burns and Verrall, 1974, 2 | T; DH |
| 0.9 | 383. | crystaline, II | crystaline, I | Burns and Verrall, 1974, 2 | T; DH |
References
Go To: Top, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Burns and Verrall, 1974
Burns, J.A.; Verrall, R.E.,
Thermodynamics of tetraalkyl- and bis-tetraalkylammonium bromides. II. Heat capacities of solid state from 273 to 373 K.,
Thermochim. Acta, 1974, 9, 277. [all data]
Coker, Ambrose, et al., 1970
Coker, T.G.; Ambrose, J.; Janz, G.J.,
Fusion properties of some ionic quaternary ammonium compounds.,
J. Am. Chem. Soc., 1970, 92, 5293. [all data]
Burns and Verrall, 1974, 2
Burns, I.A.; Verrall, R.E.,
Thermodynamics of tetralkyl- and bis-tetraalkylammonium bromides. II. Heat capacities of solid state from 273 to 373 K,
Thermochim. Acta, 1974, 9, 277-287. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Tfus Fusion (melting) point ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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