2,2-Bis(fluoromethyl)-1,3-difluoropropane
- Formula: C5H8F4
- Molecular weight: 144.1106
- IUPAC Standard InChI: InChI=1S/C5H8F4/c6-1-5(2-7,3-8)4-9/h1-4H2
- IUPAC Standard InChIKey: ACBHFORVXDMTHO-UHFFFAOYSA-N
- CAS Registry Number: 338-23-8
- Chemical structure:
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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 | 69.350 | cal/mol*K | N/A | Westrum, 1959 | crystaline, I phase |
Constant pressure heat capacity of solid
| Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 50.801 | 298.15 | Westrum, 1959 | crystaline, I phase; Based on data 10 to 350 K, to be reported elsewhere. |
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 as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tfus | 362. | K | N/A | Murrill, Whitehead, et al., 1972 | Crystal phase 1 phase; Uncertainty assigned by TRC = 1. K; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| Ttriple | 367.06 | K | N/A | Trowbridge and Westrum, 1964 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.01 K; TRC |
Enthalpy of fusion
| ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 1.23 | 367.4 | Domalski and Hearing, 1996 | AC |
Enthalpy of phase transition
| ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 1.229 | 367.43 | crystaline, I | liquid | Trowbridge and Westrum, 1964, 2 | DH |
| 3.1573 | 249.40 | crystaline, II | crystaline, I | Westrum, 1959 | Lambda transition, no details.; DH |
Entropy of phase transition
| ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 3.344 | 367.43 | crystaline, I | liquid | Trowbridge and Westrum, 1964, 2 | DH |
| 12.7 | 249.40 | crystaline, II | crystaline, I | Westrum, 1959 | Lambda; DH |
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.
Westrum, 1959
Westrum, E.F., Jr.,
Ordering transitions in symmetrical molecules, Symp. Thermodynam. Fritens-Wattens,
Tirol Austria, 1959, No.36, 11p. [all data]
Murrill, Whitehead, et al., 1972
Murrill, E.; Whitehead, M.E.; Breed, L.,
Solid-solid phase transition determined by differential scanning calori- meter,
Thermochim. Acta, 1972, 3, 311. [all data]
Trowbridge and Westrum, 1964
Trowbridge, J.C.; Westrum, E.F.,
Heat capacities and thermodynamic properties of globular molecules X. Fusion of pentaerythrityl fluoride,
J. Phys. Chem., 1964, 68, 255-8. [all data]
Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D.,
Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III,
J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985
. [all data]
Trowbridge and Westrum, 1964, 2
Trowbridge, J.C.; Westrum, E.F., Jr.,
Heat capacities and thermodynamic properties of globular molecules. X. Fusion of pentaerythrityl fluoride,
J. Phys. Chem., 1964, 68, 255-258. [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) Tfus Fusion (melting) point Ttriple Triple point temperature ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔfusH Enthalpy of fusion - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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