2,6-Lutidine

• Formula: C₇H₉N
• Molecular weight: 107.1531
• IUPAC Standard InChI: InChI=1S/C7H9N/c1-6-4-3-5-7(2)8-6/h3-5H,1-2H3 Copy

  
• IUPAC Standard InChIKey: OISVCGZHLKNMSJ-UHFFFAOYSA-N Copy
• CAS Registry Number: 108-48-5
• 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: Pyridine, 2,6-dimethyl-; α,α'-Dimethylpyridine; α,α'-Lutidine; 2,6-Dimethylpyridine; 2,6-Dimethypyridine; α,α'-Lutidin; NSC 2155
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• Information on this page:
  • Phase change data
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Gas Chromatography
• Data at other public NIST sites:
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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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
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of vaporization

Enthalpy of vaporization

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

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Antoine Equation Parameters

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

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Enthalpy of fusion

Temperature of phase transition

References

Go To: Top, Phase change data, Notes

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

Chirico, Hossenlopp, et al., 1994
Chirico, R.D.; Hossenlopp, I.A.; Gammon, B.E.; Knipmeyer, S.E.; Steele, W.V., Heat capacities of the six dimethylpyridines between the temperatures 10 K and 445 K and methyl-group rotational barriers in the solid state a,b, J. Chem. Thermodyn., 1994, 26, 11, 1187, https://doi.org/10.1006/jcht.1994.1138 . [all data]

Majer and Svoboda, 1985
Majer, V.; Svoboda, V., Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]

Ambrose and Grant, 1957
Ambrose, D.; Grant, D.G., The Critical Temperatures of Some Hydrocarbons and Pyridine Bases, Trans. Faraday Soc., 1957, 53, 771. [all data]

Lipkind and Chickos, 2009
Lipkind, Dmitri; Chickos, James S., An examination of the vaporization enthalpies and vapor pressures of pyrazine, pyrimidine, pyridazine, and 1,3,5-triazine, Struct Chem, 2009, 20, 1, 49-58, https://doi.org/10.1007/s11224-008-9389-5 . [all data]

Ben-makhlouf-Hakem, Ait-Kaci, et al., 2005
Ben-makhlouf-Hakem, Hamama; Ait-Kaci, Ahmed; Jose, Jacques, Vapour pressures and excess functions of (3,5; 2,6)dimethylpyridine+n-hexane, n-heptane and n-octane measurement and prediction, Fluid Phase Equilibria, 2005, 232, 1-2, 189-206, https://doi.org/10.1016/j.fluid.2005.03.028 . [all data]

Chickos, Hosseini, et al., 1995
Chickos, James S.; Hosseini, Sarah; Hesse, Donald G., Determination of vaporization enthalpies of simple organic molecules by correlations of changes in gas chromatographic net retention times, Thermochimica Acta, 1995, 249, 41-62, https://doi.org/10.1016/0040-6031(95)90670-3 . [all data]

Andon, Cox, et al., 1957
Andon, R.J.L.; Cox, J.D.; Herington, E.F.G.; Martin, J.F., The second virial coefficients of pyridine and benzene, and certain of their methyl homologues, Trans. Faraday Soc., 1957, 53, 1074. [all data]

Sakoguchi, Ueoka, et al., 1995
Sakoguchi, Akihiro; Ueoka, Ryuichi; Kato, Yasuo; Arai, Yasuhiko, Vapor Pressures of Alkylpyridines and Alkylpyrazines., KAGAKU KOGAKU RONBUNSHU, 1995, 21, 1, 219-223, https://doi.org/10.1252/kakoronbunshu.21.219 . [all data]

Steele, Chirico, et al., 1995
Steele, W.V.; Chirico, R.D.; Nguyen, A.; Knipmeyer, S.E., Vapor pressures, high-temperature heat capacities, critical properties, derived thermodynamic functions, and barriers to methyl-group rotation, for the six dimethylpyridines, The Journal of Chemical Thermodynamics, 1995, 27, 3, 311-334, https://doi.org/10.1006/jcht.1995.0030 . [all data]

Lencka, 1990
Lencka, Malgorzata, Measurements of the vapour pressures of pyridine, 2-methylpyridine, 2,4-dimethylpyridine, 2,6-dimethylpyridine, and 2,4,6-trimethylpyridine from 0.1 kPa to atmospheric pressure using a modified Swietoslawski ebulliometer, The Journal of Chemical Thermodynamics, 1990, 22, 5, 473-480, https://doi.org/10.1016/0021-9614(90)90139-H . [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]

Herington and Martin, 1953
Herington, E.F.G.; Martin, J.F., Vapour pressures of pyridine and its homologues, Trans. Faraday Soc., 1953, 49, 154, https://doi.org/10.1039/tf9534900154 . [all data]

Wisniewska, Lencka, et al., 1986
Wisniewska, Barbara; Lencka, Malgorzata; Rogalski, Marek, Vapour pressures of 2,4-, 2,6-, and 3,5-dimethylpyridine at temperatures from 267 to 360 K, The Journal of Chemical Thermodynamics, 1986, 18, 8, 703-708, https://doi.org/10.1016/0021-9614(86)90102-3 . [all data]

Majer, Svoboda, et al., 1985
Majer, V.; Svoboda, V.; Lencka, M., Enthalpies of vaporization and cohesive energies of dimethylpyridines and trimethylpyridines, The Journal of Chemical Thermodynamics, 1985, 17, 4, 365-370, https://doi.org/10.1016/0021-9614(85)90133-8 . [all data]

Herington and Martin, 1953, 2
Herington, E.F.G.; Martin, J.F., Vapour Pressures of Pyridine and its Homologues, Trans. Faraday Soc., 1953, 49, 154-162, https://doi.org/10.1039/tf9534900154 . [all data]

Chirico, Hossenlopp, et al., 1994, 2
Chirico, R.D.; Hossenlopp, I.A.; Gammon, B.E.; Knipmeyer, S.E.; Steele, W.V., Heat capacities of the six dimethylpyridines between the temperatures 10 K and 445 K and methyl-group rotational barriers in the solid state a,b, The Journal of Chemical Thermodynamics, 1994, 26, 11, 1187-1218, https://doi.org/10.1006/jcht.1994.1138 . [all data]

Steele, Chirico, et al., 1986
Steele, W.V.; Chirico, R.D.; Collier, W.B.; Hossenlopp, I.A.; Nguyen, A.; Strube, M.M., Thermochemical and thermophysical properties of organic nitrogen compounds found in fossil materials, NIPER Report, 1986, 188, 112p. [all data]

Notes

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• Symbols used in this document:
  

  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  Ttrs	Temperature of phase transition
  ΔfusH	Enthalpy 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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