Naphthalene-tetracyanoethylene adduct
- Formula: C16H8N4
- Molecular weight: 256.2615
- CAS Registry Number: 1223-66-1
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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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°solid,1 bar | 384.3 | J/mol*K | N/A | Boerio-Goates and Westrum, 1980 |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 328.7 | 298.15 | Boerio-Goates and Westrum, 1980 | T = 5 to 300 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 by: Eugene S. Domalski and Elizabeth D. Hearing
Temperature of phase transition
| Ttrs (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|
| 160. | crystaline, III | crystaline, II | Boerio-Goates and Westrum, 1979 | S = 5.10 J/mol*K Bifurcated peak. Transition region 150 to 172.5 K. |
| 222. | crystaline, II | crystaline, I | Boerio-Goates and Westrum, 1979 | S = 5.02 J/mol*K Extended transition. Transition region 172.5 to 240 K. |
Enthalpy of phase transition
| ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.8226 | 160. | crystaline, III | crystaline, II | Boerio-Goates and Westrum, 1980 | |
| 1.029 | 240. | crystaline, II | crystaline, I | Boerio-Goates and Westrum, 1980 |
Entropy of phase transition
| ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 5.10 | 160. | crystaline, III | crystaline, II | Boerio-Goates and Westrum, 1980 | |
| 5.02 | 240. | crystaline, II | crystaline, I | Boerio-Goates and Westrum, 1980 |
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.
Boerio-Goates and Westrum, 1980
Boerio-Goates, J.; Westrum, E.F., Jr.,
Thermodynamic studies of orientational disorder in p-molecular compounds. II. Heat capacity of naphthalene-tetracyanoethylene,
Mol. Cryst. Liq. Cryst., 1980, 60, 237-248. [all data]
Boerio-Goates and Westrum, 1979
Boerio-Goates, J.; Westrum, E.F., Jr.,
Orientational disorder in p-p molecular compounds by cryogenic thermophysical measurements,
Mol. Cryst. Liq. Cryst., 1979, 50, 259-268. [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) Ttrs Temperature of phase transition ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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