Mesitylene
- Formula: C9H12
- Molecular weight: 120.1916
- IUPAC Standard InChIKey: AUHZEENZYGFFBQ-UHFFFAOYSA-N
- CAS Registry Number: 108-67-8
- 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: Benzene, 1,3,5-trimethyl-; s-Trimethylbenzene; 1,3,5-Trimethylbenzene; sym-Trimethylbenzene; Fleet-X; TMB; UN 2325; 2,4,6-Trimethylbenzene; 3,5-Dimethyltoluene; NSC 9273; Trimethylbenzene; Trimethylbenzol; 1,3,5-trimethylbenzene (mesitylene); Trimethylbenzene (Related); Trimethylbenzol (Related)
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Gas phase thermochemistry 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 by: Glushko Thermocenter, Russian Academy of Sciences, Moscow
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
S°gas | 92.09 ± 0.15 | cal/mol*K | N/A | Taylor R.D., 1955 |
Constant pressure heat capacity of gas
Cp,gas (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
24.93 | 200. | Draeger, 1985 | Discrepancies with other statistically calculated values of S(T) and Cp(T) amount to 1, 2, and 3 J/mol*K for [ Thermodynamics Research Center, 1997], [ Pitzer K.S., 1943], and [ Taylor W.J., 1946], respectively. |
32.50 | 273.15 | ||
35.23 ± 0.1 | 298.15 | ||
35.44 | 300. | ||
46.30 | 400. | ||
56.07 | 500. | ||
64.34 | 600. | ||
71.27 | 700. | ||
77.13 | 800. | ||
82.10 | 900. | ||
86.33 | 1000. | ||
89.96 | 1100. | ||
93.09 | 1200. | ||
95.77 | 1300. | ||
98.09 | 1400. | ||
100.1 | 1500. |
Condensed phase thermochemistry data
Go To: Top, Gas 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔcH°liquid | -1241.19 ± 0.31 | kcal/mol | Ccb | Johnson, Prosen, et al., 1945 | Corresponding ΔfHºliquid = -15.16 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°liquid | -1243.5 | kcal/mol | Ccb | Richards and Barry, 1915 | At 291 K; Corresponding ΔfHºliquid = -12.9 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°liquid | 65.380 | cal/mol*K | N/A | Taylor and Kilpatrick, 1955 | DH |
Constant pressure heat capacity of liquid
Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
49.677 | 298.15 | Grolier, Roux-Desgranges, et al., 1993 | DH |
49.12 | 294.99 | Andolenko and Grigor'ev, 1979 | T = 295 to 424 K. Unsmoothed experimental datum given as 1.710 kJ/kg*K.; DH |
49.632 | 298.15 | Wilhelm, Faradjzadeh, et al., 1979 | DH |
49.6381 | 298.15 | Fortier and Benson, 1977 | DH |
49.35 | 298. | Recko, 1968 | T = 24 to 40°C. Equation only.; DH |
48.150 | 299.8 | Helfrey, Heiser, et al., 1955 | T = 80 to 220°F.; DH |
50.031 | 298.15 | Taylor and Kilpatrick, 1955 | T = 20 to 305 K.; DH |
50.91 | 298. | Kurbatov, 1947 | T = 15 to 155°C, mean Cp, five temperatures.; DH |
50.50 | 298. | von Reis, 1881 | T = 292 to 403 K.; DH |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Taylor R.D., 1955
Taylor R.D.,
Entropy, heat capacity, and heats of transition of 1,3,5-trimethylbenzene,
J. Chem. Phys., 1955, 23, 1232-1235. [all data]
Draeger, 1985
Draeger, J.A.,
The methylbenzenes II. Fundamental vibrational shifts, statistical thermodynamic functions, and properties of formation,
J. Chem. Thermodyn., 1985, 17, 263-275. [all data]
Thermodynamics Research Center, 1997
Thermodynamics Research Center,
Selected Values of Properties of Chemical Compounds., Thermodynamics Research Center, Texas A&M University, College Station, Texas, 1997. [all data]
Pitzer K.S., 1943
Pitzer K.S.,
The thermodynamics and molecular structure of benzene and its methyl derivatives,
J. Am. Chem. Soc., 1943, 65, 803-829. [all data]
Taylor W.J., 1946
Taylor W.J.,
Heats, equilibrium constants, and free energies of formation of the alkylbenzenes,
J. Res. Nat. Bur. Stand., 1946, 37, 95-122. [all data]
Johnson, Prosen, et al., 1945
Johnson, W.H.; Prosen, E.J.; Rossini, F.D.,
Heats of combustion and isomerization of the eight C9H12 alkylbenzenes,
J. Res. NBS, 1945, 35, 141-146. [all data]
Richards and Barry, 1915
Richards, T.W.; Barry, F.,
The heats of combustion of aromatic hydrocarbons and hexamethylene,
J. Am. Chem. Soc., 1915, 37, 993-1020. [all data]
Taylor and Kilpatrick, 1955
Taylor, R.D.; Kilpatrick, J.E.,
Entropy, heat capacity, heats of transition of 1,3,5-trimethylbenzene,
J. Chem. Phys., 1955, 23, 1232-1235. [all data]
Grolier, Roux-Desgranges, et al., 1993
Grolier, J.-P.E.; Roux-Desgranges, G.; Berkane, M.; Jimenez, E.; Wilhelm, E.,
Heat capacities and densities of mixtures of very polar substances 2. Mixtures containing N,N-dimethylformamide,
J. Chem. Thermodynam., 1993, 25(1), 41-50. [all data]
Andolenko and Grigor'ev, 1979
Andolenko, R.A.; Grigor'ev, B.A.,
Investigation of isobaric heat capacity of aromatic hydrocarbons at atmospheric pressure, Iaz. Vyssh. Ucheb. Zaved.,
Neft i Gaz (11), 1979, 78, 90. [all data]
Wilhelm, Faradjzadeh, et al., 1979
Wilhelm, E.; Faradjzadeh, A.; Grolier, J.-P.E.,
Molar excess heat capacities and excess volumes of 1,2-dichloroethane + cyclooctane, + mesitylene, and + tetrachloromethane,
J. Chem. Thermodynam., 1979, 11, 979-984. [all data]
Fortier and Benson, 1977
Fortier, J.-L.; Benson, G.C.,
Excess heat capacities of binary mixtures of tetrachloromethane witlh some aromatic liquids at 298.15 K,
J. Chem. Thermodynam., 1977, 9, 1181-1188. [all data]
Recko, 1968
Recko, W.M.,
Excess heat capacity of the binary systems formed by n-propyl alcohol with benzene, mesitylene and cyclohexane,
Bull. Acad. Pol. Sci. Ser. Sci. Chim., 1968, 16, 549-552. [all data]
Helfrey, Heiser, et al., 1955
Helfrey, P.F.; Heiser, D.A.; Sage, B.H.,
Isobaric heat capacities at bubble point, Two trimethylbenzenes and n-heptane,
Ind. Eng. Chem., 1955, 44, 2385-2388. [all data]
Kurbatov, 1947
Kurbatov, V.Ya.,
Specific heat of liquids. I. Specific heat of benzenoid hydrocarbons,
Zhur. Obshch. Khim., 1947, 17, 1999-2003. [all data]
von Reis, 1881
von Reis, M.A.,
Die specifische Wärme flüssiger organischer Verbindungen und ihre Beziehung zu deren Moleculargewicht,
Ann. Physik [3], 1881, 13, 447-464. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas Cp,liquid Constant pressure heat capacity of liquid S°gas Entropy of gas at standard conditions S°liquid Entropy of liquid at standard conditions ΔcH°liquid Enthalpy of combustion of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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