Tetramethylammonium chloride
- Formula: C4H12ClN
- Molecular weight: 109.598
- IUPAC Standard InChI: InChI=1S/C4H12N.ClH/c1-5(2,3)4;/h1-4H3;1H/q+1;/p-1
- IUPAC Standard InChIKey: OKIZCWYLBDKLSU-UHFFFAOYSA-M
- CAS Registry Number: 75-57-0
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: TMAC; Methanaminium, N,N,N-trimethyl-, chloride; Ammonium, tetramethyl-, chloride; USAF AN-8
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Condensed phase thermochemistry data
Go To: Top, Phase change data, References, Notes
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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°solid,1 bar | 45.581 | cal/mol*K | N/A | Chang and Westrum, 1962 |
Constant pressure heat capacity of solid
| Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 37.510 | 298.15 | Chang and Westrum, 1962 | T = 5 to 350 K. |
Phase change data
Go To: Top, Condensed phase thermochemistry data, References, Notes
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
Enthalpy of phase transition
| ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 2.367 | 536. | crystaline, II | crystaline, I | Murrill and Breed, 1970 | |
| 0.02780 | 75.76 | crystaline | Chang and Westrum, 1962 | ||
| 0.02591 | 184.85 | crystaline, II | crystaline, I | Chang and Westrum, 1962 | Transition over range 180 to 190 K. |
Entropy of phase transition
| ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 4.40 | 536. | crystaline, II | crystaline, I | Murrill and Breed, 1970 | |
| 0.368 | 75.76 | crystaline | Chang and Westrum, 1962 | ||
| 0.14 | 184.85 | crystaline, II | crystaline, I | Chang and Westrum, 1962 | Transition |
References
Go To: Top, 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.
Chang and Westrum, 1962
Chang, S.-S.; Westrum, E.F., Jr.,
Heat capacities and thermodynamic properties of two tetramethylammonium halides,
J. Chem. Phys., 1962, 36, 2420-2423. [all data]
Murrill and Breed, 1970
Murrill, E.; Breed, L.,
Solid-solid phase transitions determined by differential scanning calorimetry,
Thermochim. Acta, 1970, 1, 239-246. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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