Cholestane
- Formula: C27H48
- Molecular weight: 372.6700
- IUPAC Standard InChI: InChI=1S/C27H48/c1-19(2)9-8-10-20(3)23-14-15-24-22-13-12-21-11-6-7-17-26(21,4)25(22)16-18-27(23,24)5/h19-25H,6-18H2,1-5H3/t20-,21-,22+,23-,24+,25?,26+,27-/m0/s1
- IUPAC Standard InChIKey: XIIAYQZJNBULGD-BTSBFKJRSA-N
- CAS Registry Number: 481-21-0
- Chemical structure:
This structure is also available as a 2d Mol file - Stereoisomers:
- Other names: Cholestane, (5α)-; 5α-Cholestane; α-Cholestane; 28,29,30-Trinorlanostane; 10,13-Dimethyl-17-(1',5'-dimethylhexyl)-hexadecahydrocyclopenta(a)phenanthrene; 5A-Cholestane, TMS; 17-(1,5-Dimethylhexyl)-10,13-dimethyl-hexahydro-1H-cyclopenta[a]-phenanthrene (5-α-cholestane)
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Phase change data
Go To: Top, Reaction 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: William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔsubH° | 133.8 | kJ/mol | N/A | Mokbel, Ruzicka, et al., 2000 |
Enthalpy of vaporization
| ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 108.4 | 352. | N/A | Mokbel, Ruzicka, et al., 2000 | |
| 115.6 | 496. | A | Stephenson and Malanowski, 1987 | Based on data from 481. to 538. K. |
Enthalpy of fusion
| ΔfusH (kJ/mol) | Temperature (K) | Reference |
|---|---|---|
| 25.4 | 351.8 | Mokbel, Ruzicka, et al., 2000 |
Reaction 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
+
=
By formula: H2 + C27H46 = C27H48
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -108.2 ± 0.71 | kJ/mol | Chyd | Turner, Meador, et al., 1957 | liquid phase; solvent: Acetic acid |
+
=
By formula: H2 + C27H46 = C27H48
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -117.0 ± 0.59 | kJ/mol | Chyd | Turner, Meador, et al., 1957 | liquid phase; solvent: Acetic acid |
+ C27H46 =
By formula: H2 + C27H46 = C27H48
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -114.2 ± 1.0 | kJ/mol | Chyd | Turner, Meador, et al., 1957 | liquid phase; solvent: Acetic acid |
+
=
By formula: H2 + C27H46 = C27H48
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -114.5 ± 0.4 | kJ/mol | Chyd | Turner, Meador, et al., 1957 | liquid phase; solvent: Acetic acid |
+
=
By formula: H2 + C27H46 = C27H48
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -108.2 ± 0.54 | kJ/mol | Chyd | Turner, Meador, et al., 1957 | liquid phase; solvent: Acetic acid |
References
Go To: Top, Phase change data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Mokbel, Ruzicka, et al., 2000
Mokbel, Ilham; Ruzicka, Kvetoslav; Majer, Vladimir; Ruzicka, Vlastimil; Ribeiro, Madeleine; Jose, Jacques; Zábranský, Milan,
Vapor pressures and thermal data for three high-boiling compounds of petroleum interest: 1-phenyldodecane, (5α)-cholestane, adamantane,
Fluid Phase Equilibria, 2000, 169, 2, 191-207, https://doi.org/10.1016/S0378-3812(99)00342-8
. [all data]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Turner, Meador, et al., 1957
Turner, R.B.; Meador, W.R.; Winkler, R.E.,
Heats of hydrogenation. II. Heats of hydrogenation and the acid-catalyzed isomerization of some unsaturated steroids,
J. Am. Chem. Soc., 1957, 79, 4122-4127. [all data]
Notes
Go To: Top, Phase change data, Reaction thermochemistry data, References
- Symbols used in this document:
ΔfusH Enthalpy of fusion ΔrH° Enthalpy of reaction at standard conditions ΔsubH° Enthalpy of sublimation at standard conditions ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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