Azobenzene

• Formula: C₁₂H₁₀N₂
• Molecular weight: 182.2212
• IUPAC Standard InChI: InChI=1S/C12H10N2/c1-3-7-11(8-4-1)13-14-12-9-5-2-6-10-12/h1-10H Copy

  
• IUPAC Standard InChIKey: DMLAVOWQYNRWNQ-UHFFFAOYSA-N Copy
• CAS Registry Number: 103-33-3
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Species with the same structure:
  • Azobenzene, (E)-
• Other names: Diazene, diphenyl-; Azobenzide; Azobenzol; Benzene, azobis-; Benzene, azodi-; Benzeneazobenzene; Diazobenzene; Diphenyldiimide; 1,2-Diphenyldiazene; Azobenzeen; Azobisbenzene; Azodibenzeneazofume; Azofume; Benzofume; Diphenyldiazene; ENT 14,611; NCI-C02926; USAF EK-704; Azodibenzene; Azobenzen; Diazene, 1,2-diphenyl-; NSC 2102
• Information on this page:
  • Phase change data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Gas Chromatography
• Data at other public NIST sites:
  • X-ray Photoelectron Spectroscopy Database, version 5.0
• Options:
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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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (atm)
    T = temperature (K)

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Enthalpy of fusion

Entropy of fusion

Gas phase ion energetics 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:
LL - Sharon G. Lias and Joel F. Liebman
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

Appearance energy determinations

References

Go To: Top, Phase change data, Gas phase ion energetics data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]

Bergmann, Fischer, et al., 1953
Bergmann, E.D.; Fischer, E.; Jaffe, J.H., Exalted Distortion Polarizations of Some COlored Hydrocarbons, J. Am. Chem. Soc., 1953, 75, 3230-3. [all data]

Sorum and Durand, 1952
Sorum, C.H.; Durand, E.A., The Melting of Binary Eutectics, J. Am. Chem. Soc., 1952, 74, 1071. [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]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Cingolani and Berchiesi, 1974
Cingolani, A.; Berchiesi, G., Thermodynamic properties of organic compounds. 1. A DSC study of phase transitions in aliphatic dicarboxylic acids, J. Therm. Anal., 1974, 6, 87-90. [all data]

Eykman, 1889
Eykman, J.F., Zur kryoskopischen Molekulargewichtsbestimmung, Z. Physik. Chem., 1889, 4, 497-519. [all data]

Natalis and Franklin, 1981
Natalis, P.; Franklin, J.L., Ionization and dissociation of diphenyl and condensed-ring aromatics by electron impact. III. Azobenzene, Int. J. Mass Spectrom. Ion Phys., 1981, 40, 35. [all data]

Petrachenko, Vovna, et al., 1993
Petrachenko, N.E.; Vovna, V.I.; Furin, G.G., Photoelectron HeI spectra of fluorinated azo- and azoxy-benzenes, J. Fluorine Chem., 1993, 63, 85. [all data]

Furin, Petrachenko, et al., 1989
Furin, G.G.; Petrachenko, N.E.; Vovna, V.I., Photoelectron spectra of fluorine-containing azoxybenzenes, J. Org. Chem. USSR, 1989, 26, 1725, In original 1998. [all data]

Rao, 1975
Rao, C.N.R., Lone-pair ionization bands of chromophores in the photoelectron spectra of organic molecules, Indian J. Chem., 1975, 13, 950. [all data]

Notes

Go To: Top, Phase change data, Gas phase ion energetics data, References

• Symbols used in this document:
  

  AE	Appearance energy
  Tboil	Boiling point
  Tfus	Fusion (melting) point
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion
  ΔsubH°	Enthalpy of sublimation at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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