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 |
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, 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]
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]
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]
Notes
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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