cis-Azobenzene
- Formula: C12H10N2
- Molecular weight: 182.2212
- CAS Registry Number: 1080-16-6
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 450.6 ± 2.1 | kJ/mol | Cpha | Dias, Minas Da Piedade, et al., 1992 | Photoisomerization; ALS |
| ΔfH°gas | 460.1 | kJ/mol | N/A | Schulze, Petrick, et al., 1977 | Value computed using ΔfHsolid° value of 367.2±1.6 kj/mol from Schulze, Petrick, et al., 1977 and ΔsubH° value of 92.9 kj/mol from Dias, Minas Da Piedade, et al., 1992.; DRB |
| ΔfH°gas | 455.2 | kJ/mol | N/A | Cole and Gilbert, 1951 | Value computed using ΔfHsolid° value of 362.3 kj/mol from Cole and Gilbert, 1951 and ΔsubH° value of 92.9 kj/mol from Dias, Minas Da Piedade, et al., 1992.; DRB |
| ΔfH°gas | 451.9 | kJ/mol | N/A | Corruccini and Gilbert, 1939 | Value computed using ΔfHsolid° value of 359.0±3.0 kj/mol from Corruccini and Gilbert, 1939 and ΔsubH° value of 92.9 kj/mol from Dias, Minas Da Piedade, et al., 1992.; DRB |
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 | 357.7 ± 2.1 | kJ/mol | Cpha | Dias, Minas Da Piedade, et al., 1992 | Photoisomerization; ALS |
| ΔfH°solid | 367.2 ± 1.6 | kJ/mol | Ccb | Schulze, Petrick, et al., 1977 | ALS |
| ΔfH°solid | 362.3 | kJ/mol | Ccb | Cole and Gilbert, 1951 | ALS |
| ΔfH°solid | 359. ± 3. | kJ/mol | Ccb | Corruccini and Gilbert, 1939 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -6517.4 ± 1.6 | kJ/mol | Ccb | Schulze, Petrick, et al., 1977 | ALS |
| ΔcH°solid | -6513.7 | kJ/mol | Ccb | Cole and Gilbert, 1951 | ALS |
| ΔcH°solid | -6508. ± 3. | kJ/mol | Ccb | Corruccini and Gilbert, 1939 | ALS |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 229.33 | 300. | Bouwstra, De Leeuw, et al., 1985 | T = 300 to 400 K.; DH |
| 229.3 | 300. | Van Miltenburg and Bouwstra, 1984 | T = 90 to 320 K.; DH |
| 219. | 298.15 | Schulze, Petrick, et al., 1977 | T = 298 to 333 K. Cp(c) = 219 + 1.029(T - 298.15 K) J/mol*K (298 to 333 K).; DH |
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:
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔsubH° | 92.9 | kJ/mol | N/A | Dias, Minas Da Piedade, et al., 1992 | DRB |
| ΔsubH° | 92.92 ± 0.12 | kJ/mol | V | Cammenga, Behrens, et al., 1977 | ALS |
| ΔsubH° | 92.92 ± 0.12 | kJ/mol | V | Schulze, Petrick, et al., 1977 | ALS |
| ΔsubH° | 92.92 | kJ/mol | C | Wolf and Cammenga, 1977 | ALS |
Enthalpy of sublimation
| ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 92.9 | 288. | N/A | Stephenson and Malanowski, 1987 | Based on data from 273. to 323. K.; AC |
| 92.9 ± 0.12 | 328. | ME | Schulte, Petrick, et al., 1977 | Based on data from 298. to 357. K.; AC |
Enthalpy of fusion
| ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 22.520 | 341.03 | Van Miltenburg and Bouwstra, 1984 | DH |
| 22.650 | 341.8 | Schulze, Petrick, et al., 1977 | DH |
Entropy of fusion
| ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 66.0 | 341.03 | Van Miltenburg and Bouwstra, 1984 | DH |
Enthalpy of phase transition
| ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 22.530 | 341.06 | crystaline, I | liquid | Bouwstra, De Leeuw, et al., 1985 | DH |
Entropy of phase transition
| ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 66.06 | 341.06 | crystaline, I | liquid | Bouwstra, De Leeuw, et al., 1985 | DH |
Reaction 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
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
C12H10N2 =
By formula: C12H10N2 = C12H10N2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -45.2 ± 2.4 | kJ/mol | Cpha | Dias, Minas Da Piedade, et al., 1992 | solid phase; Photoisomerization |
| ΔrH° | -48.2 ± 0.3 | kJ/mol | Ciso | Wolf and Cammenga, 1977 | solid phase |
| ΔrH° | -47.3 | kJ/mol | Ciso | Wolf and Cammenga, 1977 | gas phase; Gas phase |
C12H10N2 =
By formula: C12H10N2 = C12H10N2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -48.0 ± 1.5 | kJ/mol | Cm | Cammenga, Behrens, et al., 1977 | solid phase |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Dias, Minas Da Piedade, et al., 1992
Dias, A.R.; Minas Da Piedade, M.E.; Martinho Simoes, J.A.; Simoni, J.A.; Teixeira, C.; Diogo, H.P.; Meng-Yen, Y.; Pilcher, G.,
Enthalpies of formation of cis-azobenzene and trans-azobenzene,
J. Chem. Thermodyn., 1992, 24, 439-447. [all data]
Schulze, Petrick, et al., 1977
Schulze, F.W.; Petrick, H.J.; Cammenga, H.K.,
Thermodynamic properties of structural analogues benzo[c]cinnoline, trans-azobenzene, and cis-azobenzene,
Z. Phys. Chem. (Neue Folge), 1977, 107, 1-19. [all data]
Cole and Gilbert, 1951
Cole, L.G.; Gilbert, E.C.,
The heats of combustion of some nitrogen compounds and the apparent energy of the N-N bond,
J. Am. Chem. Soc., 1951, 73, 5423-5427. [all data]
Corruccini and Gilbert, 1939
Corruccini, R.J.; Gilbert, E.C.,
The heat of combustion of cis- and trans-azobenzene,
J. Am. Chem. Soc., 1939, 61, 2925-2927. [all data]
Bouwstra, De Leeuw, et al., 1985
Bouwstra, J.A.; De Leeuw, V.V.; Van Miltenburg, J.C.,
Properties of mixed-crystalline organic material prepared by zone levelling. IV. Melting properties and excess enthalpies of (trans-azobenzene + trans-stilbene),
J. Chem. Thermodynam., 1985, 17, 685-695. [all data]
Van Miltenburg and Bouwstra, 1984
Van Miltenburg, J.C.; Bouwstra, J.A.,
Thermodynamic properties of trans-azobenzene and trans-stilbene,
J. Chem. Thermodynam., 1984, 16, 61-65. [all data]
Cammenga, Behrens, et al., 1977
Cammenga, H.K.; Behrens, E.; Wolf, F.,
Thermal isomerization of cis-azobenzene in the solid state
in React. Solids, [Proc. Int. Symp.],, ed. J. Wood, O. Lindqvist, C. Helgesson, Plenum: New York,NY, 1977, 481-486. [all data]
Wolf and Cammenga, 1977
Wolf, E.; Cammenga, H.K.,
Thermodynamic and kinetic investigation of the thermal isomerization of cis-azobenzene,
Z. Phys. Chem. (Neue Folge), 1977, 107, 21-38. [all data]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Schulte, Petrick, et al., 1977
Schulte, F.W.; Petrick, H.-J.; Cammenga, H.K.; Klinge, H.,
Z. Phys. Chem. (Frankfurt), 1977, 107, 1. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid 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 ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔrH° Enthalpy of reaction at standard conditions 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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