Thiourea, tetramethyl-
- Formula: C5H12N2S
- Molecular weight: 132.227
- IUPAC Standard InChI: InChI=1S/C5H12N2S/c1-6(2)5(8)7(3)4/h1-4H3
- IUPAC Standard InChIKey: MNOILHPDHOHILI-UHFFFAOYSA-N
- CAS Registry Number: 2782-91-4
- 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: Urea, 1,1,3,3-tetramethyl-2-thio-; Basthioryl; N,N,N',N'-Tetramethylthiourea; Tetramethylthiourea; ((CH3)2N)2CS; 1,1,3,3-Tetramethyl-2-thiourea; 1,1,3,3-Tetramethylthiourea; NA-101; TMTU; Urea, thio-, tetramethyl-; NSC 102499; Thiourea, N,N,N',N'-tetramethyl-; tetramethyl-2-thiourea
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 10.7 ± 0.55 | kcal/mol | Ccr | Inagaki, Murata, et al., 1982 |
Condensed phase thermochemistry 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°solid | -9.15 ± 0.55 | kcal/mol | Ccr | Inagaki, Murata, et al., 1982 | |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -1015.0 ± 0.53 | kcal/mol | Ccr | Inagaki, Murata, et al., 1982 |
Phase change data
Go To: Top, Gas phase thermochemistry data, 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:
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 |
|---|---|---|---|---|---|
| ΔsubH° | 20.2 ± 0.7 | kcal/mol | ME | Della Gatta, Józwiak, et al., 2000 | AC |
| ΔsubH° | 20.1 | kcal/mol | N/A | Ferro, Martino, et al., 1994 | AC |
| ΔsubH° | 19.8 ± 0.1 | kcal/mol | C | Murata, Sakiyama, et al., 1985 | AC |
| ΔsubH° | 19.84 ± 0.048 | kcal/mol | C | Inagaki, Murata, et al., 1982 | ALS |
| ΔsubH° | 19.8 ± 0.05 | kcal/mol | C | Inagaki, Murata, et al., 1982 | AC |
Enthalpy of sublimation
| ΔsubH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 20. ± 0.72 | 333. | TE | Ferro, Martino, et al., 1994 | AC |
Enthalpy of fusion
| ΔfusH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 5.292 | 350.4 | DSC | Della Gatta, Józwiak, et al., 2000 | AC |
References
Go To: Top, Gas phase thermochemistry data, 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.
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]
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]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔfusH Enthalpy of fusion ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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