Tetra-N-butylammonium bromide

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Gas phase thermochemistry 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δfgas-129.1 ± 0.76kcal/molCcbNagano, Mizuno, et al., 1991 

Condensed phase thermochemistry 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 by: Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of solid

Cp,solid (cal/mol*K) Temperature (K) Reference Comment
107.0298.Burns and Verrall, 1974crystaline, III phase; T = 273 to 373 K.
98.5298.15de Visser and Somsen, 1973T = 278 to 328 K.

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
Tfus395.KN/ABurns and Verrall, 1974, 2Crystal phase 1 phase; Uncertainty assigned by TRC = 1. K; TRC
Tfus395.KN/ACoker, Ambrose, et al., 1970Crystal phase 1 phase; Uncertainty assigned by TRC = 0.5 K; TRC

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Reference Comment
3.8599395.Burns and Verrall, 1974DH

Entropy of fusion

ΔfusS (cal/mol*K) Temperature (K) Reference Comment
9.773395.Burns and Verrall, 1974DH

Enthalpy of phase transition

ΔHtrs (kcal/mol) Temperature (K) Initial Phase Final Phase Reference Comment
0.016293.crystaline, IVcrystaline, IIIBurns and Verrall, 1974T = 293 to 295 K. H maximum value.; DH
0.3896367.crystaline, IIIcrystaline, IIBurns and Verrall, 1974T = 366.0 to 369 K.; DH
0.0801383.crystaline, IIcrystaline, IBurns and Verrall, 1974T = 382 to 383.5 K.; DH

Entropy of phase transition

ΔStrs (cal/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
0.05293.crystaline, IVcrystaline, IIIBurns and Verrall, 1974T; DH
1.1367.crystaline, IIIcrystaline, IIBurns and Verrall, 1974T; DH
0.2383.crystaline, IIcrystaline, IBurns and Verrall, 1974T; DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Nagano, Mizuno, et al., 1991
Nagano, Y.; Mizuno, H.; Sakiyama, M.; Fujiwara, T.; Kondo, Y., Hydration enthalpy of tetra-n-butylammonium ion, J. Phys. Chem., 1991, 95, 2536-2540. [all data]

Burns and Verrall, 1974
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]

de Visser and Somsen, 1973
de Visser, C.; Somsen, G., Enthalpies of solution and heat capacities of tetra-n-butylammonium bromide in several solvents from 278-328 K, J. Chem. Thermodynam., 1973, 5, 147-152. [all data]

Burns and Verrall, 1974, 2
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]


Notes

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