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)
  • Gas Chromatography
  • References
  • Notes
• Other data available:
  • UV/Visible spectrum
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
• Options:
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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

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

Go To: Top, 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), Gas Chromatography, Notes

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]

Lemoult, 1907
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]

Parks, Huffman, et al., 1933
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, 2733-2740. [all data]

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Willis, J.B., The heats of combustion of some organic bases and their salts. The resonance energies of acridine and phenazine, Trans. Faraday Soc., 1947, 43, 97-102. [all data]

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Lesbats, C.; Lichanot, A., Capacites calorifiques de durcisseurs amines et resines epoxydes, Thermochim. Acta, 1987, 109, 317-329. [all data]

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Crtzen, J.L.; Jost, W.; Sieg, L., Gleichgewichtsmessungen im System Anilin-N-Methylanilin, N-N-Dimethylanilin, 1,2-Äthandiol, Z. Elektrochem., 1957, 61, 230-246. [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
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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]

Stephenson and Malanowski, 1987
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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]

Wren, Vogelhuber, et al., 2012
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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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

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