Thiourea, tetramethyl-

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


Phase change 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:
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
Δsub85. ± 3.kJ/molMEDella Gatta, Józwiak, et al., 2000AC
Δsub84.0kJ/molN/AFerro, Martino, et al., 1994AC
Δsub83.0 ± 0.5kJ/molCMurata, Sakiyama, et al., 1985AC
Δsub83.03 ± 0.20kJ/molCInagaki, Murata, et al., 1982ALS
Δsub83.0 ± 0.2kJ/molCInagaki, Murata, et al., 1982AC

Enthalpy of sublimation

ΔsubH (kJ/mol) Temperature (K) Method Reference Comment
83. ± 3.0333.TEFerro, Martino, et al., 1994AC

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Method Reference Comment
22.14350.4DSCDella Gatta, Józwiak, et al., 2000AC

References

Go To: Top, Phase change data, Notes

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]


Notes

Go To: Top, Phase change data, References