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
Δfgas107.7 ± 0.50kcal/molCphaDias, Minas Da Piedade, et al., 1992Photoisomerization; ALS
Δfgas110.0kcal/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
Δfgas108.8kcal/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
Δfgas108.0kcal/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

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

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Individual Reactions

C12H10N2 = Azobenzene, (E)-

By formula: C12H10N2 = C12H10N2

Quantity Value Units Method Reference Comment
Δr-10.8 ± 0.57kcal/molCphaDias, Minas Da Piedade, et al., 1992solid phase; Photoisomerization
Δr-11.5 ± 0.07kcal/molCisoWolf and Cammenga, 1977solid phase
Δr-11.3kcal/molCisoWolf and Cammenga, 1977gas phase; Gas phase

C12H10N2 = Azobenzene

By formula: C12H10N2 = C12H10N2

Quantity Value Units Method Reference Comment
Δr-11.5 ± 0.36kcal/molCmCammenga, Behrens, et al., 1977solid 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.

Data compiled by: Victor Talrose, Alexander N. Yermakov, Alexy A. Usov, Antonina A. Goncharova, Axlexander N. Leskin, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

Spectrum

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UVVis 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

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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]

Le Ferve and Northcott, 1952
Le Ferve, R.J.W.; Northcott, J., J. Chem. Soc., 1952, 4082. [all data]


Notes

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