cis-Azobenzene

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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
Δfgas450.6 ± 2.1kJ/molCphaDias, Minas Da Piedade, et al., 1992Photoisomerization; ALS
Δfgas460.1kJ/molN/ASchulze, Petrick, et al., 1977Value 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
Δfgas455.2kJ/molN/ACole and Gilbert, 1951Value 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
Δfgas451.9kJ/molN/ACorruccini and Gilbert, 1939Value 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
Δfsolid357.7 ± 2.1kJ/molCphaDias, Minas Da Piedade, et al., 1992Photoisomerization; ALS
Δfsolid367.2 ± 1.6kJ/molCcbSchulze, Petrick, et al., 1977ALS
Δfsolid362.3kJ/molCcbCole and Gilbert, 1951ALS
Δfsolid359. ± 3.kJ/molCcbCorruccini and Gilbert, 1939ALS
Quantity Value Units Method Reference Comment
Δcsolid-6517.4 ± 1.6kJ/molCcbSchulze, Petrick, et al., 1977ALS
Δcsolid-6513.7kJ/molCcbCole and Gilbert, 1951ALS
Δcsolid-6508. ± 3.kJ/molCcbCorruccini and Gilbert, 1939ALS

Constant pressure heat capacity of solid

Cp,solid (J/mol*K) Temperature (K) Reference Comment
229.33300.Bouwstra, De Leeuw, et al., 1985T = 300 to 400 K.; DH
229.3300.Van Miltenburg and Bouwstra, 1984T = 90 to 320 K.; DH
219.298.15Schulze, Petrick, et al., 1977T = 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
Δsub92.9kJ/molN/ADias, Minas Da Piedade, et al., 1992DRB
Δsub92.92 ± 0.12kJ/molVCammenga, Behrens, et al., 1977ALS
Δsub92.92 ± 0.12kJ/molVSchulze, Petrick, et al., 1977ALS
Δsub92.92kJ/molCWolf and Cammenga, 1977ALS

Enthalpy of sublimation

ΔsubH (kJ/mol) Temperature (K) Method Reference Comment
92.9288.N/AStephenson and Malanowski, 1987Based on data from 273. to 323. K.; AC
92.9 ± 0.12328.MESchulte, Petrick, et al., 1977Based on data from 298. to 357. K.; AC

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Reference Comment
22.520341.03Van Miltenburg and Bouwstra, 1984DH
22.650341.8Schulze, Petrick, et al., 1977DH

Entropy of fusion

ΔfusS (J/mol*K) Temperature (K) Reference Comment
66.0341.03Van Miltenburg and Bouwstra, 1984DH

Enthalpy of phase transition

ΔHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
22.530341.06crystaline, IliquidBouwstra, De Leeuw, et al., 1985DH

Entropy of phase transition

ΔStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
66.06341.06crystaline, IliquidBouwstra, De Leeuw, et al., 1985DH

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 = Azobenzene, (E)-

By formula: C12H10N2 = C12H10N2

Quantity Value Units Method Reference Comment
Δr-45.2 ± 2.4kJ/molCphaDias, Minas Da Piedade, et al., 1992solid phase; Photoisomerization
Δr-48.2 ± 0.3kJ/molCisoWolf and Cammenga, 1977solid phase
Δr-47.3kJ/molCisoWolf and Cammenga, 1977gas phase; Gas phase

C12H10N2 = Azobenzene

By formula: C12H10N2 = C12H10N2

Quantity Value Units Method Reference Comment
Δr-48.0 ± 1.5kJ/molCmCammenga, Behrens, et al., 1977solid 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

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