p-Benzoquinone
- Formula: C6H4O2
- Molecular weight: 108.0948
- IUPAC Standard InChI: InChI=1S/C6H4O2/c7-5-1-2-6(8)4-3-5/h1-4H
- IUPAC Standard InChIKey: AZQWKYJCGOJGHM-UHFFFAOYSA-N
- CAS Registry Number: 106-51-4
- 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: 2,5-Cyclohexadiene-1,4-dione; p-Quinone; Chinone; Quinone; 1,4-Benzoquinone; 1,4-Cyclohexadienedione; Benzoquinone; Benzo-chinon; Chinon; Cyclohexadienedione; NCI-C55845; 1,4-Benzoquine; 1,4-Cyclohexadiene dioxide; 1,4-Diossibenzene; 1,4-Dioxy-benzol; p-Chinon; Rcra waste number U197; UN 2587; USAF P-220; Steara PBQ; NSC 36324
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Condensed phase thermochemistry data
Go To: Top, 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 | -44.65 ± 0.17 | kcal/mol | Ccb | Pilcher and Sutton, 1956 | ALS |
| ΔfH°solid | -44.10 ± 0.15 | kcal/mol | Ccb | Parks, Manchester, et al., 1954 | ALS |
| ΔfH°solid | -44.09 | kcal/mol | Ccb | Schreiner, 1925 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -651.482 | kcal/mol | Ccb | Magnus, 1956 | Corresponding ΔfHºsolid = -49.455 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°solid | -656.29 ± 0.10 | kcal/mol | Ccb | Pilcher and Sutton, 1956 | Corresponding ΔfHºsolid = -44.65 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°solid | -656.84 | kcal/mol | Ccb | Parks, Manchester, et al., 1954 | Corresponding ΔfHºsolid = -44.10 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°solid | -656.85 | kcal/mol | Ccb | Schreiner, 1925 | Corresponding ΔfHºsolid = -44.09 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°solid | -658.0 | kcal/mol | Ccb | Swietoslawski and Starczedska, 1925 | Corresponding ΔfHºsolid = -42.9 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of solid
| Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 30.21 | 298.15 | Ueberreiter and Orthmann, 1950 | T = 293 to 368 K. Equation only.; DH |
| 31.60 | 298. | Andrews, Lynn, et al., 1926 | T = 22 to 160°C.; DH |
| 31.00 | 291.2 | Lange, 1924 | T = 22 to 291 K. Value is unsmoothed experimental datum.; DH |
References
Go To: Top, 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.
Pilcher and Sutton, 1956
Pilcher, G.; Sutton, L.E.,
The heats of combustion of quinol and p-benzoquinone and the thermodynamic quantities of the oxidation-reduction reaction,
J. Chem. Soc., 1956, 2695-2700. [all data]
Parks, Manchester, et al., 1954
Parks, G.S.; Manchester, K.E.; Vaughan, L.M.,
Heats of combustion and formation of some alcohols, phenols, and ketones,
J. Chem. Phys., 1954, 22, 2089-2090. [all data]
Schreiner, 1925
Schreiner, E.,
Thermodynamics of the quinhydrone electrode and the chemical constant of hydrogen,
Z. Phys. Chem., 1925, 117, 57-87. [all data]
Magnus, 1956
Magnus, A.,
Die resonanzenergien der parachinone Aui grund der prazisionsmessungsen ihrer verbrennungswarmen durch herrn gerhard wittwer,
Z. Phys. Chem. (Neue Folge), 1956, 9, 141-161. [all data]
Swietoslawski and Starczedska, 1925
Swietoslawski, W.; Starczedska, H.,
Correction des donnees thermochimiques de M.A. Valeur,
J. Chem. Phys., 1925, 22, 399-401. [all data]
Ueberreiter and Orthmann, 1950
Ueberreiter, K.; Orthmann, H.-J.,
Specifische Wärme, spezifisches Volumen, Temperatur- und Wärme-leittähigkeit einiger disubstituierter Benzole und polycyclischer Systeme,
Z. Natursforsch. 5a, 1950, 101-108. [all data]
Andrews, Lynn, et al., 1926
Andrews, D.H.; Lynn, G.; Johnston, J.,
The heat capacities and heat of crystallization of some isomeric aromatic compounds,
J. Am. Chem. Soc., 1926, 48, 1274-1287. [all data]
Lange, 1924
Lange, F.,
Untersuchungen über die spezifische Wärme bei tiefen Temperaturen,
Z. Phys. Chem., 1924, 110, 343-362. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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