Barbital

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Condensed phase thermochemistry data

Go To: Top, Phase change data, IR Spectrum, UV/Visible spectrum, 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

Quantity Value Units Method Reference Comment
Δcsolid-986.2kcal/molCcbFischer and Wrede, 1904Heat of combustion corrected for pressure
Δcsolid-986.50kcal/molCcbLemoult, 1904 

Phase change data

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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

Quantity Value Units Method Reference Comment
Tfus463.KN/AKuffner, Bush, et al., 1957Uncertainty assigned by TRC = 4. K; not clear that this was measured by author; TRC
Quantity Value Units Method Reference Comment
Δsub28.0 ± 0.1kcal/molMERibeiro da Silva, Ribeiro da Silva, et al., 2009Based on data from 355. to 377. K.; AC

Enthalpy of sublimation

ΔsubH (kcal/mol) Temperature (K) Method Reference Comment
27.2 ± 0.1366.MERibeiro da Silva, Ribeiro da Silva, et al., 2009Based on data from 355. to 377. K.; AC

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Method Reference Comment
5.93462.DSCRibeiro da Silva, Ribeiro da Silva, et al., 2009AC
5.970462.6N/AChauvet, De Maury, et al., 1986AC

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


IR Spectrum

Go To: Top, Condensed phase thermochemistry data, Phase change data, UV/Visible spectrum, References, Notes

Data compiled by: Coblentz Society, Inc.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director


UV/Visible spectrum

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Victor Talrose, Eugeny B. Stern, Antonina A. Goncharova, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

Spectrum

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Additional Data

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Source Klotz and Askounis, 1947
Owner INEP CP RAS, NIST OSRD
Collection (C) 2007 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin INSTITUTE OF ENERGY PROBLEMS OF CHEMICAL PHYSICS, RAS
Source reference RAS UV No. 465
Instrument Beckman spectrophotometer
Melting point 190
Boiling point sub.

References

Go To: Top, Condensed phase thermochemistry data, Phase change data, IR Spectrum, UV/Visible spectrum, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Fischer and Wrede, 1904
Fischer, E.; Wrede, F., Uber die Verbrennungswarme einiger organischer Verbindungen, Sitzungsber. Dtsch. Akad. Wiss. Berlin Kl. Math. Phys. Tech., 1904, 687-715. [all data]

Lemoult, 1904
Lemoult, M.P., Remarques sur une serie recenie de determinations calorimetriques, Compt. Rend., 1904, 663-635. [all data]

Kuffner, Bush, et al., 1957
Kuffner, R.J.; Bush, M.T.; Bircher, L.J., Studies on the surface tension of aqueous barbituric acid solutions, J. Am. Chem. Soc., 1957, 79, 1587-1589. [all data]

Ribeiro da Silva, Ribeiro da Silva, et al., 2009
Ribeiro da Silva, Maria das Dores M.C.; Ribeiro da Silva, Manuel A.V.; Freitas, Vera L.S.; Roux, Maria Victoria; Jiménez, Pilar; Temprado, Manuel; Dávalos, Juan Z.; Cabildo, Pilar; Claramunt, Rosa M.; Elguero, José, Structural studies of cyclic ureas: 3. Enthalpy of formation of barbital, The Journal of Chemical Thermodynamics, 2009, 41, 12, 1400-1407, https://doi.org/10.1016/j.jct.2009.06.018 . [all data]

Chauvet, De Maury, et al., 1986
Chauvet, A.; De Maury, G.; Terol, A.; Masse, J., Etude thermoanalytique de substances psychotropes, Thermochimica Acta, 1986, 97, 143-159, https://doi.org/10.1016/0040-6031(86)87015-0 . [all data]

Klotz and Askounis, 1947
Klotz, I.M.; Askounis, T., Absorption spectra and tautomerism of cyanuric acid, melamine and some related compounds, J. Am. Chem. Soc., 1947, 69, 801-803. [all data]


Notes

Go To: Top, Condensed phase thermochemistry data, Phase change data, IR Spectrum, UV/Visible spectrum, References