o-Toluidine

• Formula: C₇H₉N
• Molecular weight: 107.1531
• IUPAC Standard InChI: InChI=1S/C7H9N/c1-6-4-2-3-5-7(6)8/h2-5H,8H2,1H3 Copy

  
• IUPAC Standard InChIKey: RNVCVTLRINQCPJ-UHFFFAOYSA-N Copy
• CAS Registry Number: 95-53-4
• 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.
• Other names: Benzenamine, 2-methyl-; o-Aminotoluene; o-Methylaniline; o-Methylbenzenamine; o-Tolylamine; 1-Amino-2-methylbenzene; 2-Aminotoluene; 2-Methyl-1-aminobenzene; 2-Methylaniline; 2-Methylbenzenamine; 2-Toluidine; 2-Amino-1-methylbenzene; 1-Methyl-2-aminobenzene; o-Toluide; o-Toluidin; o-Toluidyna; Aniline, 2-methyl-; C.I. 37077; Rcra waste number U328; NSC 15348
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Phase change data
  • Gas phase ion energetics data
  • Gas Chromatography
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
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Data at NIST subscription sites:

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

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Phase change data

Go To: Top, Gas phase ion energetics data, Gas Chromatography, References, Notes

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
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of vaporization

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

Go To: Top, Phase change data, Gas Chromatography, References, Notes

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:
LL - Sharon G. Lias and Joel F. Liebman
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 C₇H₉N⁺ (ion structure unspecified)

Ionization energy determinations

Appearance energy determinations

Gas Chromatography

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

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, 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, temperature ramp

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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, Phase change data, Gas phase ion energetics data, Gas Chromatography, Notes

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

Steele, Chirico, et al., 1994
Steele, W.V.; Chirico, R.D.; Nguyen, A.; Knipmeyer, S.E., The thermodynamic properties of 2-methylaniline and trans-(R,S)-decahydroquinoline, J. Chem. Thermodyn., 1994, 26, 5, 515, https://doi.org/10.1006/jcht.1994.1061 . [all data]

Glaser and Ruland, 1957
Glaser, F.; Ruland, H., Untersuchungsen über dampfdruckkurven und kritische daten einiger technisch wichtiger organischer substanzen, Chem. Ing. Techn., 1957, 29, 772. [all data]

Steele, Chirico, et al., 1994, 2
Steele, W.V.; Chirico, R.D.; Nguyen, A.; Knipmeyer, S.E., The thermodynamic properties of 2-methylaniline and trans-(r,S)-decahydroquinoline, J. Chem. Thermodyn., 1994, 26, 515-544. [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]

Dreisbach and Shrader, 1949
Dreisbach, R.R.; Shrader, S.A., Vapor Pressure--Temperature Data on Some Organic Compounds, Ind. Eng. Chem., 1949, 41, 12, 2879-2880, https://doi.org/10.1021/ie50480a054 . [all data]

Boublik, Fried, et al., 1984
Boublik, T.; Fried, V.; Hala, E., The Vapour Pressures of Pure Substances: Selected Values of the Temperature Dependence of the Vapour Pressures of Some Pure Substances in the Normal and Low Pressure Region, 2nd ed., Elsevier, New York, 1984, 972. [all data]

Meva'a and Lichanot, 1990
Meva'a, L.M.; Lichanot, A., Proprietes thermodynamiques en phase condensee des ortho, meta et para fluorotoluene, cresol et toluidine, Thermochim. Acta, 1990, 158, 335-345. [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Selim, Rabbih, et al., 1992
Selim, E.T.M.; Rabbih, M.A.; Fahmey, M.A.; Hawash, M.F., Electron impact study of [C₆H₆]⁺ fragment ions produced from isomeric C₇H₉N precursors using the deconvoluted first differential technique and kinetic release measurements, Int. J. Mass Spectrom. Ion Processes, 1992, 113, 133. [all data]

Maier and Turner, 1973
Maier, J.P.; Turner, D.W., Steric inhibition of resonance studied by molecular photoelectron spectroscopy Part 3. Anilines, Phenols and Related Compounds, J. Chem. Soc. Faraday Trans. 2, 1973, 69, 521. [all data]

Cowling and Johnstone, 1973
Cowling, S.A.; Johnstone, R.A.W., Photoelectron spectroscopy: The effects of steric inhibition to resonance in anilines, J. Electron Spectrosc. Relat. Phenom., 1973, 2, 161. [all data]

Potapov and Iskakov, 1971
Potapov, V.K.; Iskakov, L.I., Electronic structure and photoionization of aromatic amines, High Energy Chem., 1971, 5, 237, In original 264. [all data]

Farrell and Newton, 1966
Farrell, P.G.; Newton, J., Ionization potentials of primary aromatic amines and aza-hydrocarbons, Tetrahedron Lett., 1966, 5517. [all data]

Eland, Shepherd, et al., 1966
Eland, J.H.D.; Shepherd, P.J.; Danby, C.J., Ionization potentials of aromatic molecules determined by analytical interpretation of electron impact data, Z. Naturforsch., 1966, 21a, 1580. [all data]

Kinoshita, 1962
Kinoshita, M., The absorption spectra of the molecular complexes of aromatic compounds with p-bromanil, Bull. Chem. Soc. Japan, 1962, 35, 1609. [all data]

Briegleb and Czekalla, 1959
Briegleb, G.; Czekalla, J., Die Bestimmung von lonisierungsenergien aus den Spektren von Elektronenubergangskomplexen, Z.Elektrochem., 1959, 63, 6. [all data]

Palmer, Moyes, et al., 1979
Palmer, M.H.; Moyes, W.; Spiers, M.; Ridyard, J.N.A., The electronic structure of substituted benzenes; a study of aniline, the toluidines, phenylenediamines and fluoroanilines by photoelectron spectroscopy and ab initio calculations, J. Mol. Struct., 1979, 53, 235. [all data]

Kobayashi and Nagakura, 1974
Kobayashi, T.; Nagakura, S., Photoelectron spectra of substituted benzenes, Bull. Chem. Soc. Jpn., 1974, 47, 2563. [all data]

Kobayashi and Nagakura, 1972
Kobayashi, T.; Nagakura, S., Photoelectron spectra of anilines, Chem. Lett., 1972, 1013. [all data]

Anderson, Jurel, et al., 1973
Anderson, A.; Jurel, S.; Shymanska, M.; Golender, L., Gas-liquid chromatography of some aliphatic and heterocyclic mono- and pollyfunctional amines. VII. Retention indices of amines in some polar and unpolar stationary phases, Latv. PSR Zinat. Akad. Vestis Kim. Ser., 1973, 1, 51-63. [all data]

Sun and Stremple, 2003
Sun, G.; Stremple, P., Retention index characterization of flavor, fragrance, and many other compounds on DB-1 and DB-XLB, 2003, retrieved from http://www.chem.agilent.com/cag/cabu/pdf/b-0279.pdf. [all data]

Gautzsch and Zinn, 1996
Gautzsch, R.; Zinn, P., Use of incremental models to estimate the retention indexes of aromatic compounds, Chromatographia, 1996, 43, 3/4, 163-176, https://doi.org/10.1007/BF02292946 . [all data]

Peng, Ding, et al., 1988
Peng, C.T.; Ding, S.F.; Hua, R.L.; Yang, Z.C., Prediction of Retention Indexes I. Structure-Retention Index Relationship on Apolar Columns, J. Chromatogr., 1988, 436, 137-172, https://doi.org/10.1016/S0021-9673(00)94575-8 . [all data]

Rostad and Pereira, 1986
Rostad, C.E.; Pereira, W.E., Kovats and Lee retention indices determined by gas chromatography/mass spectrometry for organic compounds of environmental interest, J. Hi. Res. Chromatogr. Chromatogr. Comm., 1986, 9, 6, 328-334, https://doi.org/10.1002/jhrc.1240090603 . [all data]

Yasuhara, Shiraishi, et al., 1997
Yasuhara, A.; Shiraishi, H.; Nishikawa, M.; Yamamoto, T.; Uehiro, T.; Nakasugi, O.; Okumura, T.; Kenmotsu, K.; Fukui, H.; Nagase, M.; Ono, Y.; Kawagoshi, Y.; Baba, K.; Noma, Y., Determination of organic components in leachates from hazardous waste disposal sites in Japan by gas chromatography-mass spectrometry, J. Chromatogr. A, 1997, 774, 1-2, 321-332, https://doi.org/10.1016/S0021-9673(97)00078-2 . [all data]

Peng, Yang, et al., 1991
Peng, C.T.; Yang, Z.C.; Maltby, D., Prediction of retention indexes. III. Silylated derivatives of polar compounds, J. Chromatogr., 1991, 586, 1, 113-129, https://doi.org/10.1016/0021-9673(91)80029-G . [all data]

Bur'yan and Nabivach, 1992
Bur'yan, P.; Nabivach, V.M., Investigation of composition of higher heterocnitrogen bases of brown coal tar, Coke Chem. (Engl. Transl.), 1992, 5, 29-33. [all data]

Okumura, 1991
Okumura, T., retention indices of environmental chemicals on methyl silicone capillary column, Journal of Environmental Chemistry (Japan), 1991, 1, 2, 333-358, https://doi.org/10.5985/jec.1.333 . [all data]

Peng, Yang, et al., 1991, 2
Peng, C.T.; Yang, Z.C.; Ding, S.F., Prediction of rentention idexes. II. Structure-retention index relationship on polar columns, J. Chromatogr., 1991, 586, 1, 85-112, https://doi.org/10.1016/0021-9673(91)80028-F . [all data]

Chen, Keeran, et al., 2002
Chen, P.H.; Keeran, W.S.; Van Ausdale, W.A.; Schindler, D.R.; Roberts, D.W., Application of Lee retention indices to the confirmation of tentatively identified compounds from GC/MS analysis of environmental samples, Technical paper, Analytical Services Division, Environmental ScienceEngineering, Inc, PO Box 1703, Gainesville, FL 32602, 2002, 11. [all data]

Notes

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

• Symbols used in this document:
  

  AE	Appearance energy
  IE (evaluated)	Recommended ionization energy
  Pc	Critical pressure
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions

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