Hexacosane
- Formula: C26H54
- Molecular weight: 366.7070
- IUPAC Standard InChIKey: HMSWAIKSFDFLKN-UHFFFAOYSA-N
- CAS Registry Number: 630-01-3
- 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: n-Hexacosane
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Phase change data
Go To: Top, Gas Chromatography, 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
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 534. | K | N/A | Krafft, 1883 | Uncertainty assigned by TRC = 5. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 330. ± 1. | K | AVG | N/A | Average of 30 out of 33 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 329.18 | K | N/A | Domanska and Wyrzykowska-Stankiewicz, 1991 | Crystal phase 1 phase; Uncertainty assigned by TRC = 1. K; TRC |
Ttriple | 329.26 | K | N/A | Andon and Martin, 1976 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.02 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 131.7 | kJ/mol | CGC | Chickos and Hanshaw, 2004 | Based on data from 434. to 539. K.; AC |
ΔvapH° | 139.3 ± 0.5 | kJ/mol | CGC | Chickos, Webb, et al., 2002 | AC |
ΔvapH° | 136.4 ± 0.2 | kJ/mol | GS | Puri, Chickos, et al., 2001 | AC |
ΔvapH° | 140.0 ± 2.2 | kJ/mol | CGC | Chickos and Wilson, 1997 | AC |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 177. ± 10. | kJ/mol | B | Piacente, Pompili, et al., 1991 | AC |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
132. ± 1. | 414. | TE | Piacente, Fontana, et al., 1994 | Based on data from 391. to 437. K.; AC |
97.6 | 419. | TE,ME,GS | Piacente, Pompili, et al., 1991 | Based on data from 404. to 546. K.; AC |
99.0 ± 3.8 | 487. | GS | Piacente and Scardala, 1990 | Based on data from 455. to 519. K.; AC |
101.6 | 481. | A,EST | Stephenson and Malanowski, 1987 | Based on data from 466. to 685. K. See also Kudchadker and Zwolinski, 1966.; AC |
94.5 | 493. | A | Stephenson and Malanowski, 1987 | Based on data from 478. to 530. K.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)
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Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
477. to 672.9 | 6.57631 | 4224.36 | -30.387 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Enthalpy of fusion
ΔfusH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
61.1 | 330.9 | DSC | Gnatyuk, Platonova, et al., 2007 | AC |
60.1 | 329.1 | DSC | Mondieig, Rajabalee, et al., 2004 | AC |
59.5 | 329.5 | N/A | Domalski and Hearing, 1996 | AC |
57.6 | 328.2 | DSC | Lourdin, Roux, et al., 1992 | AC |
Entropy of fusion
ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
98.7 | 326.5 | Domalski and Hearing, 1996 | CAL |
180.6 | 329.5 |
Enthalpy of phase transition
ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
33.500 | 325.6 | crystaline, II | crystaline, I | Barbillon, Schuffenecker, et al., 1991 | DH |
60.000 | 329.2 | crystaline, I | liquid | Barbillon, Schuffenecker, et al., 1991 | DH |
32.820 | 325.8 | crystaline, II | crystaline, I | Claudy and Letoffe, 1991 | DH |
59.790 | 329.6 | crystaline, I | liquid | Claudy and Letoffe, 1991 | DH |
30.360 | 324.40 | crystaline, II | crystaline, I | Domanska and Wyrzykowska-Stankiewicz, 1991, 2 | DH |
63.920 | 329.18 | crystaline, I | liquid | Domanska and Wyrzykowska-Stankiewicz, 1991, 2 | DH |
33.420 | 325.5 | crystaline, II | crystaline, I | Andon and Martin, 1976 | DH |
60.700 | 329.25 | crystaline, I | liquid | Andon and Martin, 1976 | DH |
34.225 | 326.55 | crystaline, II | crystaline, I | Company, 1973 | DH |
59.496 | 329.55 | crystaline, I | liquid | Company, 1973 | DH |
32.217 | 326.45 | crystaline, II | crystaline, I | Schaerer, Busso, et al., 1955 | DH |
59.496 | 329.45 | crystaline, I | liquid | Schaerer, Busso, et al., 1955 | DH |
35.020 | 323.3 | crystaline, II | crystaline, I | Garner, Van Bibber, et al., 1931 | DH |
58.743 | 329.3 | crystaline, I | liquid | Garner, Van Bibber, et al., 1931 | DH |
Entropy of phase transition
ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
102.7 | 325.5 | crystaline, II | crystaline, I | Andon and Martin, 1976 | DH |
184.4 | 329.25 | crystaline, I | liquid | Andon and Martin, 1976 | DH |
104.8 | 326.55 | crystaline, II | crystaline, I | Company, 1973 | DH |
180.5 | 329.55 | crystaline, I | liquid | Company, 1973 | DH |
98.7 | 326.45 | crystaline, II | crystaline, I | Schaerer, Busso, et al., 1955 | DH |
180.6 | 329.45 | crystaline, I | liquid | Schaerer, Busso, et al., 1955 | DH |
108.3 | 323.3 | crystaline, II, á | crystaline, I, à transition | Garner, Van Bibber, et al., 1931 | DH |
178.4 | 329.3 | crystaline, I | liquid | Garner, Van Bibber, et al., 1931 | DH |
Gas Chromatography
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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Lee's RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-5MS | 415.93 | Chen, Keeran, et al., 2002 | 30. m/0.25 mm/0.5 μm, 40. C @ 1. min, 4. K/min; Tend: 310. C |
Lee's RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-5 | 415.9 | Fuentes, Font, et al., 2007 | Column length: 60. m; Program: not specified |
References
Go To: Top, Phase change data, Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Krafft, 1883
Krafft, F.,
Chem.-Ztg., 1883, 7, 153. [all data]
Domanska and Wyrzykowska-Stankiewicz, 1991
Domanska, U.; Wyrzykowska-Stankiewicz, D.,
Enthalpies of fusion and solid-solid transition of even-numbered paraffins docosane, hexacosane, octacosane and tetracosane,
Thermochim. Acta, 1991, 179, 265-71. [all data]
Andon and Martin, 1976
Andon, R.J.L.; Martin, J.F.,
Thermodynamic properties of hexacosane,
J. Chem. Thermodynam., 1976, 8, 1159-1166. [all data]
Chickos and Hanshaw, 2004
Chickos, James S.; Hanshaw, William,
Vapor Pressures and Vaporization Enthalpies of the n -Alkanes from C 21 to C 30 at T = 298.15 K by Correlation Gas Chromatography,
J. Chem. Eng. Data, 2004, 49, 1, 77-85, https://doi.org/10.1021/je0301747
. [all data]
Chickos, Webb, et al., 2002
Chickos, James S.; Webb, Paul; Nichols, Gary; Kiyobayashi, Tetsu; Cheng, Pei-Chao; Scott, Lawrence,
The enthalpy of vaporization and sublimation of corannulene, coronene, and perylene at T= 298.15 K,
The Journal of Chemical Thermodynamics, 2002, 34, 8, 1195-1206, https://doi.org/10.1006/jcht.2002.0977
. [all data]
Puri, Chickos, et al., 2001
Puri, Swati; Chickos, James S.; Welsh, William J.,
Determination of Vaporization Enthalpies of Polychlorinated Biphenyls by Correlation Gas Chromatography,
Anal. Chem., 2001, 73, 7, 1480-1484, https://doi.org/10.1021/ac001246p
. [all data]
Chickos and Wilson, 1997
Chickos, James S.; Wilson, Joe A.,
Vaporization Enthalpies at 298.15 K of the n -Alkanes from C 21 to C 28 and C 30,
J. Chem. Eng. Data, 1997, 42, 1, 190-197, https://doi.org/10.1021/je960089h
. [all data]
Piacente, Pompili, et al., 1991
Piacente, Vincenzo; Pompili, Tiziano; Scardala, Paolo; Ferro, Daniela,
Temperature dependence of the vaporization enthalpies of n-alkanes from vapour-pressure measurements,
The Journal of Chemical Thermodynamics, 1991, 23, 4, 379-396, https://doi.org/10.1016/S0021-9614(05)80092-8
. [all data]
Piacente, Fontana, et al., 1994
Piacente, Vincenzo; Fontana, Danilo; Scardala, Paolo,
Enthalpies of Vaporization of a Homologous Series of n-Alkanes Determined from Vapor Pressure Measurements,
J. Chem. Eng. Data, 1994, 39, 2, 231-237, https://doi.org/10.1021/je00014a009
. [all data]
Piacente and Scardala, 1990
Piacente, Vincenzo; Scardala, Paolo,
Vaporization enthalpies and entropies of some n-alkanes,
Thermochimica Acta, 1990, 159, 193-200, https://doi.org/10.1016/0040-6031(90)80108-B
. [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]
Kudchadker and Zwolinski, 1966
Kudchadker, A.P.; Zwolinski, B.J.,
Vapor Pressure and Boiling Points of Normal Alkanes, C 21 to C 100 .,
J. Chem. Eng. Data, 1966, 11, 2, 253-255, https://doi.org/10.1021/je60029a039
. [all data]
Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022
. [all data]
Gnatyuk, Platonova, et al., 2007
Gnatyuk, I.I.; Platonova, N.V.; Puchkovskaya, G.A.; Kotelnikova, E.N.; Filatov, S.K.; Baran, J.; Drozd, M.,
Polymorphic transformations of C26H54 and C28H58 n-paraffins as typical rotator substances,
J Struct Chem, 2007, 48, 4, 654-665, https://doi.org/10.1007/s10947-007-0099-4
. [all data]
Mondieig, Rajabalee, et al., 2004
Mondieig, D.; Rajabalee, F.; Metivaud, V.; Oonk, H.A.J.; Cuevas-Diarte, M.A.,
n -Alkane Binary Molecular Alloys,
Chem. Mater., 2004, 16, 5, 786-798, https://doi.org/10.1021/cm031169p
. [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]
Lourdin, Roux, et al., 1992
Lourdin, D.; Roux, A.H.; Grolier, J.-P.E.; Buisine, J.-M.,
Thermobarometric and differential scanning calorimetric study of the polymorphism of some even and odd paraffins (C26, C27, C40, C60),
Thermochimica Acta, 1992, 204, 1, 99-110, https://doi.org/10.1016/0040-6031(92)80319-R
. [all data]
Barbillon, Schuffenecker, et al., 1991
Barbillon, P.; Schuffenecker, L.; Dellacherie, J.; Balesdent, D.; Dirande, M.,
Variation d'enthalpie subie de 260 K a 340 K par les n-paraffines, comprises entrel'octadecane et l'hexacosane,
J. Chim. Phys. Phys.-Chim. Biol., 1991, 88, 91-113. [all data]
Claudy and Letoffe, 1991
Claudy, P.; Letoffe, J.M.,
Phase transitions in even n-alkanes CnH2n+2, n = 16-28. Characterization by differential calorimetric analysis and by thermooptical analysis. Effect of deuteration,
Calorim. Anal. Therm., 1991, 22, 281-290. [all data]
Domanska and Wyrzykowska-Stankiewicz, 1991, 2
Domanska, U.; Wyrzykowska-Stankiewicz, D.,
Enthalpies of fusion and solid-solid transition of even-numbered paraffins docosane, hexacosane, octacosane and tetracosane,
Thermochim. Acta, 1991, 179, 265-271. [all data]
Company, 1973
Company, J.C.,
Measurement and interpretation of crystallization equilibriums of heavy paraffin and aromatic hydrocarbon solutions,
Chem. Eng. Sci., 1973, 28, 318-323. [all data]
Schaerer, Busso, et al., 1955
Schaerer, A.A.; Busso, C.J.; Smith, A.E.; Skinner, L.B.,
Properties of pure normal alkanes in the C17 to C36 range,
J. Am. Chem. Soc., 1955, 77, 2017-2019. [all data]
Garner, Van Bibber, et al., 1931
Garner, W.E.; Van Bibber, K.; King, A.M.,
The melting points and heats of crystallization of the normal long-chain hydrocarbons,
J. Chem. Soc. (London), 1931, 1931, 1533-1541. [all data]
Chen, Keeran, et al., 2002
Chen, P.H.; Keeran, W.S.; Van Ausdale, W.A.; Schindler, D.R.; Roberts, D.W.,
Application of Lee retention indices to the confirmation of tentatively identified compounds from GC/MS analysis of environmental samples, Technical paper, Analytical Services Division, Environmental ScienceEngineering, Inc, PO Box 1703, Gainesville, FL 32602, 2002, 11. [all data]
Fuentes, Font, et al., 2007
Fuentes, M.J.; Font, R.; Gomez-Rico, M.F.; Martin-Gullon, I.,
Pyrolysis and combustion of waste lubricant oil from diesel cars: Decomposition and pollutants,
J. Anal. Appl. Pyrolysis, 2007, 79, 1-2, 215-226, https://doi.org/10.1016/j.jaap.2006.12.004
. [all data]
Notes
Go To: Top, Phase change data, Gas Chromatography, References
- Symbols used in this document:
Tboil Boiling point Tfus Fusion (melting) point Ttriple Triple point temperature ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔsubH° Enthalpy of sublimation at standard conditions ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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