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Thiourea, tetramethyl-

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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:
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Deltasub20.2 ± 0.7kcal/molMEDella Gatta, Józwiak, et al., 2000AC
Deltasub20.1kcal/molN/AFerro, Martino, et al., 1994AC
Deltasub19.8 ± 0.1kcal/molCMurata, Sakiyama, et al., 1985AC
Deltasub19.84 ± 0.048kcal/molCInagaki, Murata, et al., 1982ALS
Deltasub19.8 ± 0.05kcal/molCInagaki, Murata, et al., 1982AC

Enthalpy of sublimation

DeltasubH (kcal/mol) Temperature (K) Method Reference Comment
20. ± 0.72333.TEFerro, Martino, et al., 1994AC

Enthalpy of fusion

DeltafusH (kcal/mol) Temperature (K) Method Reference Comment
5.292350.4DSCDella Gatta, Józwiak, et al., 2000AC


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

Della Gatta, Józwiak, et al., 2000
Della Gatta, Giuseppe; Józwiak, Malgorzata; Brunetti, Bruno; Abate, Lorenzo, Enthalpies and entropies of fusion and of sublimation at the temperature 298.15 K of thiourea and sevenN-alkylthioureas, The Journal of Chemical Thermodynamics, 2000, 32, 8, 979-997, https://doi.org/10.1006/jcht.2000.0662 . [all data]

Ferro, Martino, et al., 1994
Ferro, Daniela; Martino, Rosalba; Gatta, Giuseppe Della, Sublimation enthalpies and entropies of thiourea, 1-methyl-2-thiourea, 1,3-dimethyl-2-thiourea, and 1,1,3,3-tetramethyl-2-thiourea, The Journal of Chemical Thermodynamics, 1994, 26, 2, 183-190, https://doi.org/10.1006/jcht.1994.1037 . [all data]

Murata, Sakiyama, et al., 1985
Murata, S.; Sakiyama, M.; Seki, S., Sublimation calorimetric studies using a calvet microcalorimeter, Thermochimica Acta, 1985, 88, 1, 121-126, https://doi.org/10.1016/0040-6031(85)85419-8 . [all data]

Inagaki, Murata, et al., 1982
Inagaki, S.; Murata, S.; Sakiyama, M., Thermochemical studies on thioacetamide and tetramethylthiourea. Estimation of stablization energies due to interaction between thiocarbonyl group and neighboring nitrogen atom, Bull. Chem. Soc. Jpn., 1982, 55, 2808-2813. [all data]


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