4-hexylbenzoic acid
- Formula: C13H18O2
- Molecular weight: 206.2808
- IUPAC Standard InChI: InChI=1S/C13H18O2/c1-2-3-4-5-6-11-7-9-12(10-8-11)13(14)15/h7-10H,2-6H2,1H3,(H,14,15)
- IUPAC Standard InChIKey: CPEPWESLFZVUEP-UHFFFAOYSA-N
- CAS Registry Number: 21643-38-9
- Chemical structure:
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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
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 | 371.0 | K | N/A | Privalko, Puchkovskaya, et al., 1985 | Smectic liquid crystal phase; Uncertainty assigned by TRC = 0.1 K; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔsubH° | 29.54 ± 0.24 | kcal/mol | ME | Monte, Almeida, et al., 2004 | Based on data from 347. to 363. K.; AC |
Entropy of fusion
| ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 11.21 | 371.0 | Privalko, Puchkovskaya, et al., 1985 | CAL |
| 1.51 | 380.0 |
References
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Privalko, Puchkovskaya, et al., 1985
Privalko, V.P.; Puchkovskaya, G.A.; Shermatov, E.N.; Yakubov, A.A.,
Polymorphic Transitions in Alkylbenzoic Acids,
Mol. Cryst. Liq. Cryst., 1985, 126, 2-4, 289, https://doi.org/10.1080/00268948508084797
. [all data]
Monte, Almeida, et al., 2004
Monte, Manuel J.S.; Almeida, Ana R.R.P.; Ribeiro da Silva, Manuel A.V.,
Thermodynamic study of the sublimation of eight 4-n-alkylbenzoic acids,
The Journal of Chemical Thermodynamics, 2004, 36, 5, 385-392, https://doi.org/10.1016/j.jct.2004.02.001
. [all data]
Notes
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- Symbols used in this document:
Tfus Fusion (melting) point ΔfusS Entropy of fusion ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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