Hydrazinecarbothioamide
- Formula: CH5N3S
- Molecular weight: 91.135
- IUPAC Standard InChI: InChI=1S/CH5N3S/c2-1(5)4-3/h3H2,(H3,2,4,5)
- IUPAC Standard InChIKey: BRWIZMBXBAOCCF-UHFFFAOYSA-N
- CAS Registry Number: 79-19-6
- 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: Semicarbazide, thio-; Isothiosemicarbazide; N-Aminothiourea; Thiocarbamoylhydrazine; Thiosemicarbazide; TSC; TSZ; 1-Amino-2-Thiourea; 1-Aminothiourea; 2-Thiosemicarbazide; Semicarbazide, 3-thio-; USAF EK-1275; Rcra waste number P116; Thiocarbamylhydrazine; NSC 2213
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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 | 128.2 ± 1.6 | kJ/mol | Ccr | Gomez and Sabbah, 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 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 | -23.85 | kJ/mol | Ccb | Nurakhmeta, Beremzhanov, et al., 1984 | ALS |
| ΔfH°solid | 2.36 ± 0.59 | kJ/mol | Ccr | Gomez and Sabbah, 1982 | ALS |
| ΔfH°solid | 24.7 ± 5.0 | kJ/mol | Ccb | Sunner, 1957 | Reanalyzed by Cox and Pilcher, 1970, Original value = 24. ± 2. kJ/mol; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -1712.43 ± 0.54 | kJ/mol | Ccr | Gomez and Sabbah, 1982 | ALS |
| ΔcH°solid | -1735.1 ± 5.0 | kJ/mol | Ccb | Sunner, 1957 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 128.2 | J/mol*K | N/A | Nurachmetov, Beremzhanov, et al., 1985 | crystaline, I phase; DH |
| S°solid,1 bar | 128.2 | J/mol*K | N/A | Nurakhmetov, Beremzhanov, et al., 1984 | DH |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 114.3 | 298.15 | Nurachmetov, Beremzhanov, et al., 1985 | crystaline, I phase; T = 8 to 330 K.; DH |
| 114.3 | 298.15 | Nurakhmetov, Beremzhanov, et al., 1984 | T = 8 to 330 K.; DH |
| 110.9 | 298.15 | Torres Gomez and Sabbah, 1982 | Cp data given as 1.217 J/g*K.; DH |
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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
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 |
|---|---|---|---|---|---|
| Tfus | 480.65 | K | N/A | Popp, 1964 | Uncertainty assigned by TRC = 2. K; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔsubH° | 125.8 ± 1.5 | kJ/mol | C | Alfonso, Gomez, et al., 1982 | AC |
| ΔsubH° | 125.8 ± 1.5 | kJ/mol | C | Gomez and Sabbah, 1982 | ALS |
Enthalpy of sublimation
| ΔsubH (kJ/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 125.800 | 298.15 | Torres Gomez and Sabbah, 1982 | DH |
Entropy of sublimation
| ΔsubS (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 421.9 | 298.15 | Torres Gomez and Sabbah, 1982 | DH |
Enthalpy of phase transition
| ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.0700 | 268.9 | crystaline, II | crystaline, I | Nurachmetov, Beremzhanov, et al., 1985 | DH |
| 0.0700 | 268.9 | crystaline, II | crystaline, I | Nurakhmetov, Beremzhanov, et al., 1984 | DH |
Entropy of phase transition
| ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.250 | 268.9 | crystaline, II | crystaline, I | Nurachmetov, Beremzhanov, et al., 1985 | DH |
| 0.250 | 268.9 | crystaline, II | crystaline, I | Nurakhmetov, Beremzhanov, et al., 1984 | DH |
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.
Gomez and Sabbah, 1982
Gomez, L.A.T.; Sabbah, R.,
Thermodynamique de substances soufrees. IV. Etude thermochimique de la thiouree, de la thiosemicarbazide et de la thiocarbohydrazide,
Thermochim. Acta, 1982, 57, 67-81. [all data]
Nurakhmeta, Beremzhanov, et al., 1984
Nurakhmeta, N.N.; Beremzhanov, B.A.; Abramova, G.V.; Lebedev, B.V.,
Thermodynamic properties of acetamide, thio-semicarbazide, and thiourea hydronitrate at (0-330) K,
Probl. Kalorim. Khim. Termodin., Dokl. Vses. Konf., 10th, 1984, 2, 460-462. [all data]
Sunner, 1957
Sunner, S.,
Reactions between hydrazine, thiocyanic acid and oxo-compounds. IV. Heats of combustion and derived data for some compounds related to thiosemicarbazide,
Acta Chem. Scand., 1957, 11, 1766-1770. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Nurachmetov, Beremzhanov, et al., 1985
Nurachmetov, N.N.; Beremzhanov, B.A.; Abramova, G.V.; Lebedev, B.V.,
Thermodynamics of (thio)amides and their compounds with mineral acids at (0-330)K,
Thermochim. Acta, 1985, 92, 329-332. [all data]
Nurakhmetov, Beremzhanov, et al., 1984
Nurakhmetov, N.N.; Beremzhanov, B.A.; Abramova, G.V.; Lebedev, B.V.,
Thermodynamic properties of acetamide, thiosemicarbazide, and thiourea hydronitrate at (0-330) K, Probl. Kalorim. Khim. Termodin., Dokl. Vses. Konf.,
10th, 1984, 2, 460-2. [all data]
Torres Gomez and Sabbah, 1982
Torres Gomez, L.A.F.; Sabbah, R.,
Thermodynamic de substances soufrees. IV. Etude thermochimique de las thiouree, de la thiosemicarbazide et de la thiocarbohydrazide,
Thermochim. Acta, 1982, 57, 67-81. [all data]
Popp, 1964
Popp, F.D.,
Some Derivatives of 3-Bromobenzaldehyde,
J. Chem. Eng. Data, 1964, 9, 381. [all data]
Alfonso, Gomez, et al., 1982
Alfonso, Luis; Gomez, Torres; Sabbah, Raphaël,
Thermodynamique de substances soufrees. IV. Etude thermochimique de la thiouree, de la thiosemicarbazide et de la thiocarbohydrazide,
Thermochimica Acta, 1982, 57, 1, 67-81, https://doi.org/10.1016/0040-6031(82)87024-X
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) Tfus Fusion (melting) point ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition 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 ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions ΔsubS Entropy of sublimation - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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