Aniline

• Formula: C₆H₇N
• Molecular weight: 93.1265
• IUPAC Standard InChI: InChI=1S/C6H7N/c7-6-4-2-1-3-5-6/h1-5H,7H2 Copy

  
• IUPAC Standard InChIKey: PAYRUJLWNCNPSJ-UHFFFAOYSA-N Copy
• CAS Registry Number: 62-53-3
• 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.
• Isotopologues:
  • Benzen-d5-amine
• Other names: Benzenamine; Aminobenzene; Aminophen; Anyvim; Benzene, amino-; Blue Oil; C.I. 76000; Phenylamine; Aniline Oil; Aniline reagent; Anilin; Anilina; Benzidam; C.I. Oxidation base 1; Cyanol; Huile D'aniline; Krystallin; Kyanol; NCI-C03736; Rcra waste number U012; UN 1547; Benzeneamine
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Gas Chromatography
  • References
  • Notes
• Options:
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Data at NIST subscription sites:

• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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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.

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

Constant pressure heat capacity of liquid

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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
BS - Robert L. Brown and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

Enthalpy of vaporization

Δ_vapH = A exp(-βT_r) (1 − T_r)^β
    Δ_vapH = Enthalpy of vaporization (at saturation pressure) (kJ/mol)
    T_r = reduced temperature (T / T_c)

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Antoine Equation Parameters

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

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Enthalpy of fusion

Entropy of fusion

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 as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
ALS - 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

 +  = ( • )

By formula: Br^- + C₆H₇N = (Br^- • C₆H₇N)

Free energy of reaction

C₆H₆N^- +  =

By formula: C₆H₆N^- + H⁺ = C₆H₇N

C₉H₁₃N⁺ +  = (C₉H₁₃N⁺ • )

By formula: C₉H₁₃N⁺ + C₆H₇N = (C₉H₁₃N⁺ • C₆H₇N)

Bond type: Charge transfer bond (positive ion)

Free energy of reaction

C₇H₉N⁺ +  = (C₇H₉N⁺ • )

By formula: C₇H₉N⁺ + C₆H₇N = (C₇H₉N⁺ • C₆H₇N)

Bond type: Charge transfer bond (positive ion)

C₈H₁₁N⁺ +  = (C₈H₁₁N⁺ • )

By formula: C₈H₁₁N⁺ + C₆H₇N = (C₈H₁₁N⁺ • C₆H₇N)

Bond type: Charge transfer bond (positive ion)

 +  = ( • )

By formula: F^- + C₆H₇N = (F^- • C₆H₇N)

C₆H₇N⁺ +  = (C₆H₇N⁺ • )

By formula: C₆H₇N⁺ + C₆H₇N = (C₆H₇N⁺ • C₆H₇N)

Bond type: Charge transfer bond (positive ion)

 +  =

By formula: C₆H₇N + C₈H₄O₃ = C₁₄H₁₁NO₃

= 0.5 + 0.5

By formula: C₇H₉N = 0.5C₈H₁₁N + 0.5C₆H₇N

 +  = ( • )

By formula: K⁺ + C₆H₇N = (K⁺ • C₆H₇N)

 +  =  + 

By formula: C₇H₅IO + C₆H₇N = HI + C₁₃H₁₁NO

 +  =  + 

By formula: C₇H₅BrO + C₆H₇N = HBr + C₁₃H₁₁NO

 +  =  + 

By formula: C₆H₇N + C₇H₅ClO = HCl + C₁₃H₁₁NO

 +  =  + 

By formula: C₈H₉NO + H₂O = C₆H₇N + C₂H₄O₂

 +  =

By formula: C₇H₄N₂O₃ + C₆H₇N = C₁₃H₁₁N₃O₃

 +  =

By formula: C₇H₁₁NO + C₆H₇N = C₁₃H₁₈N₂O

=  + 

By formula: C₁₅H₁₇NO₂ = C₉H₁₀O₂ + C₆H₇N

 +  =

By formula: C₇H₅NO + C₆H₇N = C₁₃H₁₂N₂O

=  + 

By formula: C₁₃H₁₂N₂O = C₇H₅NO + C₆H₇N

 +  = ( • )

By formula: I^- + C₆H₇N = (I^- • C₆H₇N)

 +  =  + 

By formula: C₄H₅N₃O + C₆H₇N = C₈H₉NO + C₂H₃N₃

 +  =  + 

By formula: C₃H₄N₄O + C₆H₇N = C₈H₉NO + CH₂N₄

 +  =  + 

By formula: C₄H₆O₃ + C₆H₇N = C₈H₉NO + C₂H₄O₂

 +  =

By formula: C₇H₅NO + C₆H₇N = C₁₃H₁₂N₂O

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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to C₆H₇N⁺ (ion structure unspecified)

Ionization energy determinations

Appearance energy determinations

De-protonation reactions

C₆H₆N^- +  =

By formula: C₆H₆N^- + H⁺ = C₆H₇N

Ion clustering 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:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

 +  = ( • )

By formula: Br^- + C₆H₇N = (Br^- • C₆H₇N)

Free energy of reaction

C₆H₇N⁺ +  = (C₆H₇N⁺ • )

By formula: C₆H₇N⁺ + C₆H₇N = (C₆H₇N⁺ • C₆H₇N)

Bond type: Charge transfer bond (positive ion)

C₇H₉N⁺ +  = (C₇H₉N⁺ • )

By formula: C₇H₉N⁺ + C₆H₇N = (C₇H₉N⁺ • C₆H₇N)

Bond type: Charge transfer bond (positive ion)

C₈H₁₁N⁺ +  = (C₈H₁₁N⁺ • )

By formula: C₈H₁₁N⁺ + C₆H₇N = (C₈H₁₁N⁺ • C₆H₇N)

Bond type: Charge transfer bond (positive ion)

C₉H₁₃N⁺ +  = (C₉H₁₃N⁺ • )

By formula: C₉H₁₃N⁺ + C₆H₇N = (C₉H₁₃N⁺ • C₆H₇N)

Bond type: Charge transfer bond (positive ion)

Free energy of reaction

 +  = ( • )

By formula: F^- + C₆H₇N = (F^- • C₆H₇N)

 +  = ( • )

By formula: I^- + C₆H₇N = (I^- • C₆H₇N)

 +  = ( • )

By formula: K⁺ + C₆H₇N = (K⁺ • C₆H₇N)

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

• LIQUID (NEAT); BECKMAN IR-7 (GRATING); DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 cm^-1 resolution
• SOLUTION (10% IN CCl4 FOR 3800-1300, 10% IN CS2 FOR 1300-650, 10% IN CCl4 FOR 650-250 CM^-1) VERSUS SOLVENT; PERKIN-ELMER 521 (GRATING); DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 cm^-1 resolution

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

• gas

Mass spectrum (electron ionization)

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

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, Eugeny B. Stern, Antonina A. Goncharova, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

Spectrum

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Additional Data

Gas Chromatography

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Kovats' RI, non-polar column, isothermal

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Kovats' RI, polar column, isothermal

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Van Den Dool and Kratz RI, non-polar column, temperature ramp

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Van Den Dool and Kratz RI, non-polar column, custom temperature program

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Normal alkane RI, non-polar column, isothermal

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Normal alkane RI, non-polar column, temperature ramp

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Normal alkane RI, non-polar column, custom temperature program

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Normal alkane RI, polar column, custom temperature program

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Lee's RI, non-polar column, temperature ramp

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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.

Hatton, Hildenbrand, et al., 1962
Hatton, W.E.; Hildenbrand, D.L.; Sinke, G.C.; Stull, D.R., Chemical thermodynamic properties of aniline, J. Chem. Eng. Data, 1962, 7, 229-231. [all data]

Vriens and Hill, 1952
Vriens, G.N.; Hill, A.G., Equilibria of several reactions of aromatic amines, Ind. Eng. Chem., 1952, 44, 2732-27. [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]

Anderson and Gilbert, 1942
Anderson, C.M.; Gilbert, E.C., The apparent energy of the N-N bond as calculated from heats of combustion, J. Am. Chem. Soc., 1942, 64, 2369-2372. [all data]

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Lemoult, M.P., Recherches theoriques et experimentales sur les chaleurs de combustion et de formation des composes organiques, Ann. Chim. Phys., 1907, 12, 395-432. [all data]

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von Reis, M.A., Die specifische Wärme flüssiger organischer Verbindungen und ihre Beziehung zu deren Moleculargewicht, Ann. Physik [3], 1881, 13, 447-464. [all data]

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Hatton, W.E.; Hildenbrand, D.L.; Sinke, G.C.; Stull, D.R., Chemical Thermodynamic Properties of Aniline, J. Chem. Eng. Data, 1962, 7, 229. [all data]

Ziegler and Andrews, 1942, 2
Ziegler, W.T.; Andrews, D.H., The heat capacity of benzene-d6, J. Am. Chem. Soc., 1942, 64, 2482. [all data]

Parks, Huffman, et al., 1933, 2
Parks, G.S.; Huffman, H.M.; Barmore, M., Thermal Data on Organic Compounds. XI. The Heat Capacities, Entropies and Free Energies of Ten Compounds Containing Oxygen or Nitrogen, J. Am. Chem. Soc., 1933, 55, 7, 2733, https://doi.org/10.1021/ja01334a016 . [all data]

Lagutkin and Kuropatkin, 1981
Lagutkin, O.D.; Kuropatkin, E.I., Critical coefficient of compressibility and critical dens. of aniline, Zh. Fiz. Khim., 1981, 55, 1329. [all data]

Steele, Chirico, et al., 2002
Steele, W.V.; Chirico, R.D.; Knipmeyer, S.E.; Nguyen, A., Vapor Pressure, Heat Capacity, and Density along the Saturation Line: Measurements for Benzenamine, Butylbenzene, sec -Butylbenzene, tert -Butylbenzene, 2,2-Dimethylbutanoic Acid, Tridecafluoroheptanoic Acid, 2-Butyl-2-ethyl-1,3-propanediol, 2,2,4-Trimethyl-1,3-pentanediol, and 1-Chloro-2-propanol, J. Chem. Eng. Data, 2002, 47, 4, 648-666, https://doi.org/10.1021/je010083e . [all data]

Lee, Chen, et al., 1992
Lee, Chang Ha; Chen, Quen; Mohamed, Rahoma S.; Holder, Gerald D., Vapor-liquid equilibria in the system of toluene/aniline, aniline/naphthalene, and naphthalene/quinoline, J. Chem. Eng. Data, 1992, 37, 2, 179-183, https://doi.org/10.1021/je00006a011 . [all data]

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Maher, Patrick J.; Smith, Buford D., A new total pressure vapor-liquid equilibrium apparatus. The ethanol + aniline system at 313.15, 350.81, and 386.67 K, J. Chem. Eng. Data, 1979, 24, 1, 16-22, https://doi.org/10.1021/je60080a022 . [all data]

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Ahmed, A.M.I.; Eades, R.G., Proton relaxation in solid aniline and some methyl derivatives, J. Chem. Soc., Faraday Trans. 2, 1972, 68, 2017, https://doi.org/10.1039/f29726802017 . [all data]

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Paul, G.J.C.; Kebarle, P., Stabilities of Complexes of Br- with Substituted Benzenes (SB) Based on Determinations of the Gas-Phase Equilibria Br- + SB = (BrSB)-, J. Am. Chem. Soc., 1991, 113, 4, 1148, https://doi.org/10.1021/ja00004a014 . [all data]

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Wren, S.W.; Vogelhuber, K.M.; Ichino, T.; Stanton, J.F.; Lineberger, W.C., Photoelectron Spectroscopy of Anilinide and Acidity of Aniline, J. Phys. Chem. A, 2012, 116, 12, 3118-3123, https://doi.org/10.1021/jp211463r . [all data]

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Meot-Ner (Mautner), M.; El-Shall, M.S., Ionic Charge Transfer Complexes. 1. Cationic Complexes with Delocalized and Partially Localized pi Systems, J. Am. Chem. Soc., 1986, 108, 15, 4386, https://doi.org/10.1021/ja00275a026 . [all data]

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Larson, J.W.; McMahon, T.B., Strong hydrogen bonding in gas-phase anions. An ion cyclotron resonance determination of fluoride binding energetics to bronsted acids from gas-phase fluoride exchange equilibria measurements, J. Am. Chem. Soc., 1983, 105, 2944. [all data]

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Davidson and Kebarle, 1976
Davidson, W.R.; Kebarle, P., Binding Energies and Stabilities of Potassium Ion Complexes from Studies of Gas Phase Ion Equilibria K+ + M = K+.M, J. Am. Chem. Soc., 1976, 98, 20, 6133, https://doi.org/10.1021/ja00436a011 . [all data]

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Wadso, 1965
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Notes

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• Symbols used in this document:
  

  AE	Appearance energy
  Cp,liquid	Constant pressure heat capacity of liquid
  IE (evaluated)	Recommended ionization energy
  Pc	Critical pressure
  S°liquid	Entropy of liquid at standard conditions
  T	Temperature
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  Zc	Critical compressability factor
  ΔcH°liquid	Enthalpy of combustion of liquid at standard conditions
  ΔcH°solid	Enthalpy of combustion of solid at standard conditions
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfH°liquid	Enthalpy of formation of liquid at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy of reaction at standard conditions
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions
  ρc	Critical density

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