cis-Azobenzene
- Formula: C12H10N2
- Molecular weight: 182.2212
- CAS Registry Number: 1080-16-6
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Gas 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
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. - 323. K.; AC |
| 92.9 ± 0.12 | 328. | ME | Schulte, Petrick, et al., 1977 | Based on data from 298. - 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 |
UV/Visible spectrum
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Spectrum
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Additional Data
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| Source | Le Ferve and Northcott, 1952 |
|---|---|
| Owner | INEP CP RAS, NIST OSRD Collection (C) 2007 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
| Origin | INSTITUTE OF ENERGY PROBLEMS OF CHEMICAL PHYSICS, RAS |
| Source reference | RAS UV No. 9971 |
| Instrument | Beckman DU |
| Melting point | 71 |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, UV/Visible spectrum, 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]
Le Ferve and Northcott, 1952
Le Ferve, R.J.W.; Northcott, J.,
J. Chem. Soc., 1952, 4082. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, UV/Visible spectrum, 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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