1,2-Benzenediamine
- Formula: C6H8N2
- Molecular weight: 108.1411
- IUPAC Standard InChI: InChI=1S/C6H8N2/c7-5-3-1-2-4-6(5)8/h1-4H,7-8H2
- IUPAC Standard InChIKey: GEYOCULIXLDCMW-UHFFFAOYSA-N
- CAS Registry Number: 95-54-5
- 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: o-Phenylenediamine; o-Benzenediamine; o-Diaminobenzene; C.I. Oxidation Base 16; C.I. 76010; Orthamine; 1,2-Diaminobenzene; 1,2-Phenylenediamine; 2-Aminoaniline; o-Aminoaniline; EK 1700; OPDA; PODA; SQ 15500; o-Fenylendiamin; 1,2-Fenylendiamin; NSC 5354; IK 3
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Condensed phase thermochemistry 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:
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 | 39.1 ± 5.7 | kJ/mol | Ccb | Contineanu, Wagner, et al., 1982 | ALS |
| ΔfH°solid | 0.0 | kJ/mol | Ccb | Kunyavskaya, Karyakin, et al., 1973 | see Karyakin, Rabinovich, et al., 1978; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -3543.5 ± 5.7 | kJ/mol | Ccb | Contineanu, Wagner, et al., 1982 | ALS |
| ΔcH°solid | -3504. ± 3. | kJ/mol | Ccb | Kunyavskaya, Karyakin, et al., 1973 | see Karyakin, Rabinovich, et al., 1978; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 152.09 | J/mol*K | N/A | Kunyavskaya, Karyakin, et al., 1973 | DH |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 150.82 | 298.15 | Bret-Dibat and Lichanot, 1989 | T = 200 to 500 K. Cp(c) = 135.620 + 0.5717t + 1.1893x10-3t2 + 1.0768x10-5t3 J/mol*K (t/°C). Cp value calculated from equation.; DH |
| 162.13 | 300. | Kunyavskaya, Karyakin, et al., 1973 | T = 20 to 300 K.; DH |
References
Go To: Top, Condensed phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Contineanu, Wagner, et al., 1982
Contineanu, I.; Wagner, L.; Stanescu, L.; Marchidan, D.I.,
Combustion and formation enthalpies of o-phenylenediamine, urea and 2-benzimidazolone,
Rev. Roum. Chim., 1982, 27, 205-209. [all data]
Kunyavskaya, Karyakin, et al., 1973
Kunyavskaya, S.G.; Karyakin, N.V.; Krylova, G.P.; Chernova, V.I.; Rabinovich, I.B.,
Heat capacity and thermodynamic properties of iosmeric phenylenediamines,
Tr. Khim. Khim. Tekhnol., 1973, 58-59. [all data]
Karyakin, Rabinovich, et al., 1978
Karyakin, N.V.; Rabinovich, I.B.; Sokolov, L.B.,
Thermodynamics of the synthesis of isomeric poly(phenylenephthalamides),
Vysokomol. Soedin. Ser. B, 1978, 20, 662-666. [all data]
Bret-Dibat and Lichanot, 1989
Bret-Dibat, P.; Lichanot, A.,
Thermodynamic properties of positional isomers of disubstituted benzene in condensed phase,
Thermochim. Acta, 1989, 147(2), 261-271. [all data]
Notes
Go To: Top, Condensed phase thermochemistry 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) ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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