Benzene, 2-methyl-1,3-dinitro-
- Formula: C7H6N2O4
- Molecular weight: 182.1335
- IUPAC Standard InChIKey: XTRDKALNCIHHNI-UHFFFAOYSA-N
- CAS Registry Number: 606-20-2
- 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: Toluene, 2,6-dinitro-; 2,6-Dinitrotoluene; 2,6-Dnt; 1-Methyl-2,6-dinitrobenzene; Rcra waste number U106; 2-Methyl-1,3-dinitro-benzene
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Condensed phase 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 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 |
---|---|---|---|---|---|
ΔfH°solid | -55.2 ± 2.2 | kJ/mol | Ccb | Barakat and Finch, 1984 | see Finch and Payne, 1990; ALS |
ΔfH°solid | -41.8 | kJ/mol | Ccb | Medard and Thomas, 1949 | Author's hf298_condensed=-13.4 kcal/mol; ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°solid | -3556.8 ± 1.0 | kJ/mol | Ccb | Barakat and Finch, 1984 | see Finch and Payne, 1990; ALS |
ΔcH°solid | -3570.3 | kJ/mol | Ccb | Medard and Thomas, 1949 | Author's hf298_condensed=-13.4 kcal/mol; ALS |
ΔcH°solid | -3560.9 ± 3.6 | kJ/mol | Ccb | Badoche, 1939 | Reanalyzed by Cox and Pilcher, 1970, Original value = -3563.9 kJ/mol; ALS |
ΔcH°solid | -3574. | kJ/mol | Ccb | Garner and Abernethy, 1921 | ALS |
Constant pressure heat capacity of solid
Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
217. | 305. | Finch and Payne, 1990 | T = 305 to 365 K. Unsmoothed experimental datum.; DH |
224. | 305. | Finch and Payne, 1990 | T = 305 to 365 K. Unsmoothed experimental datum.; DH |
Phase change 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 as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tfus | 329.60 | K | N/A | Finch and Payne, 1990 | Metastable crystal phase; Uncertainty assigned by TRC = 0.2 K; The melting point of the stable phase was observed after melting the metastable phase and cooling slowly; TRC |
Tfus | 339. | K | N/A | Finch and Payne, 1990 | Uncertainty assigned by TRC = 3. K; The melting point of the stable phase was observed after melting the metastable phase and cooling slowly; TRC |
Tfus | 339.19 | K | N/A | Finch and Payne, 1990 | Uncertainty assigned by TRC = 0.1 K; TRC |
Tfus | 327. | K | N/A | Hwang, Tamura, et al., 1990 | Uncertainty assigned by TRC = 0.1 K; TRC |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
77.8 | 345. | A | Stephenson and Malanowski, 1987 | Based on data from 330. to 533. K.; AC |
56.9 | 438. | A | Stephenson and Malanowski, 1987 | Based on data from 423. to 553. K. See also Maksimov, 1968.; AC |
68.7 | 344. to 427. | N/A | Pella, 1977 | See also Molard, 1958.; 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 |
---|---|---|---|---|---|
423. to 533. | 1.80416 | 551.608 | -269.179 | Maksimov, 1968, 2 | Coefficents calculated by NIST from author's data. |
Enthalpy of sublimation
ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
99.6 ± 2.3 | 275. to 325. | ME | Freedman, Kebabian, et al., 2008 | AC |
98.3 ± 0.8 | 300. | GS | Pella, 1976 | Based on data from 277. to 323. K. See also Pella, 1977.; AC |
Enthalpy of fusion
ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
19.280 | 340. | Finch and Payne, 1990 | c,form A/liq.; DH |
16.070 | 340. | Finch and Payne, 1990 | c,form B/liq.; DH |
23.85 | 327.5 | Acree, 1993 | AC |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Barakat and Finch, 1984
Barakat, A.; Finch, A.,
Thermochemistry of 2,6-dinitrotoluene,
Thermochim. Acta, 1984, 73, 205-208. [all data]
Finch and Payne, 1990
Finch, A.; Payne, J.,
Thermochemical study of 1,6-dinitrotoluene,
Thermochim. Acta, 1990, 164, 55-63. [all data]
Medard and Thomas, 1949
Medard, L.; Thomas, M.,
Determinations calorimetriques concernant dix-huit derives nitres ou nitrates organiques.,
Mem. Poudres, 1949, 29, 173-195. [all data]
Badoche, 1939
Badoche, M.M.,
Determinations des chaleurs de combustion de derives nitres de la serie benzenique,
Bull. Soc. Chim. France, 1939, 6, 570-579. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Garner and Abernethy, 1921
Garner, W.E.; Abernethy, C.L.,
Heats of combustion and formation of nitro-compounds. Part I. - Benzene, toluene, phenol and methylaniline series,
Proc. Roy. Soc. London A, 1921, 213-235. [all data]
Hwang, Tamura, et al., 1990
Hwang, D.-R.; Tamura, M.; Yoshida, T.; Tanaka, N.; Hosoya, F.,
Estimation of ΔH°f of nitro derivatives of benzene and toluene using AM1 and DSC,
J. Energ. Mater., 1990, 8, 85-98. [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]
Maksimov, 1968
Maksimov, Y.Y.,
Russ. J. Phys. Chem., 1968, 42, 11, 1550. [all data]
Pella, 1977
Pella, Peter A.,
Measurement of the vapor pressures of tnt, 2,4-dnt, 2,6-dnt, and egdn,
The Journal of Chemical Thermodynamics, 1977, 9, 4, 301-305, https://doi.org/10.1016/0021-9614(77)90049-0
. [all data]
Molard, 1958
Molard, L.,
Mem. Poudres, 1958, 40, 13. [all data]
Maksimov, 1968, 2
Maksimov, Yu,
Steam Pressures of Nitroaromatic Compouds at Different Temperatures,
Zh. Fiz. Khim., 1968, 42, 2921-2925. [all data]
Freedman, Kebabian, et al., 2008
Freedman, Andrew; Kebabian, Paul L.; Li, Ziman; Robinson, Wade A.; Wormhoudt, Joda C.,
Apparatus for determination of vapor pressures at ambient temperatures employing a Knudsen effusion cell and quartz crystal microbalance,
Meas. Sci. Technol., 2008, 19, 12, 125102, https://doi.org/10.1088/0957-0233/19/12/125102
. [all data]
Pella, 1976
Pella, Peter A.,
Generator for producing trace vapor concentrations of 2,4,6-trinitrotoluene, 2,4-dinitrotoluene, and ethylene glycol dinitrate for calibrating explosives vapor detectors,
Anal. Chem., 1976, 48, 11, 1632-1637, https://doi.org/10.1021/ac50005a054
. [all data]
Acree, 1993
Acree, William E.,
Thermodynamic properties of organic compounds,
Thermochimica Acta, 1993, 219, 97-104, https://doi.org/10.1016/0040-6031(93)80486-T
. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid Tfus Fusion (melting) point ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔfusH Enthalpy of fusion ΔsubH Enthalpy of sublimation ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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