Perfluoroeicosane
- Formula: C20F42
- Molecular weight: 1038.1469
- IUPAC Standard InChI: InChI=1S/C20F42/c21-1(22,3(25,26)5(29,30)7(33,34)9(37,38)11(41,42)13(45,46)15(49,50)17(53,54)19(57,58)59)2(23,24)4(27,28)6(31,32)8(35,36)10(39,40)12(43,44)14(47,48)16(51,52)18(55,56)20(60,61)62
- IUPAC Standard InChIKey: WSXNCJNDCDTRSA-UHFFFAOYSA-N
- CAS Registry Number: 37589-57-4
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Eicosane, dotetracontafluoro-; dotetracontafluoroicosane
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Phase change data
Go To: Top, 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
CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tfus | 437.9 | K | N/A | Starkweather, 1986 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.5 K; TRC |
| Tfus | 437.9 | K | N/A | Starkweather, 1986 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.2 K; TRC |
| Tfus | 435.6 | K | N/A | Smith. P. and Gardner, 1985 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.2 K; TRC |
| Tfus | 443.2 | K | N/A | Segwichert, 1984 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.2 K; TRC |
Enthalpy of fusion
| ΔfusH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 80.33 | 437.9 | DSC | Starkweather, 1986, 2 | AC |
Entropy of fusion
| ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 4.48 | 149.5 | Starkweather, 1986 | CAL |
| 55.45 | 202.9 | ||
| 183.44 | 437.9 |
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.
Starkweather, 1986
Starkweather, H.W., Jr.,
Melting and crystalline transitions in normal perfluoroalkanes and poly(tetrafluoroethylene),
Marcomolecules, 1986, 19, 4, 1131, https://doi.org/10.1021/ma00158a034
. [all data]
Smith. P. and Gardner, 1985
Smith. P.; Gardner, K.H.,
Macromolecules, 1985, 18, 1222. [all data]
Segwichert, 1984
Segwichert, H.,
, Dissertation, Johannes Gutenberg Univ.,Mainz, 1984. [all data]
Starkweather, 1986, 2
Starkweather, Howard W.,
Melting and crystalline transitions in normal perfluoroalkanes and poly(tetrafluoroethylene),
Macromolecules, 1986, 19, 4, 1131-1134, https://doi.org/10.1021/ma00158a034
. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Tfus Fusion (melting) point ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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