Pyridine, 2,3-dimethyl-

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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 by: Donald R. Burgess, Jr.

Quantity Value Units Method Reference Comment
Δfgas68.3kJ/molN/ACox and Gundry, 1958Value computed using ΔfHliquid° value of 19.3 kj/mol from Cox and Gundry, 1958 and ΔvapH° value of 48.95 kj/mol from missing citation.

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

Quantity Value Units Method Reference Comment
Δfliquid19.3kJ/molCcbCox and Gundry, 1958ALS
Quantity Value Units Method Reference Comment
Δcliquid-4060.2kJ/molCcbCox and Gundry, 1958ALS
Quantity Value Units Method Reference Comment
liquid243.70J/mol*KN/ASteele, Chirico, et al., 1986DH

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference Comment
189.55298.15Steele, Chirico, et al., 1986T = 10 to 450 K.; DH

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

Quantity Value Units Method Reference Comment
Tboil436.7KN/AWeast and Grasselli, 1989BS
Tboil434.4KN/AMajer and Svoboda, 1985 
Tboil433.6KN/AKyte, Jeffery, et al., 1960Uncertainty assigned by TRC = 1. K; TRC
Tboil433.4KN/AKyte, Jeffery, et al., 1960Uncertainty assigned by TRC = 0.5 K; TRC
Tboil430.75KN/AHackmann, Wibaut, et al., 1943Uncertainty assigned by TRC = 1. K; TRC
Quantity Value Units Method Reference Comment
Tfus258.35KN/AKyte, Jeffery, et al., 1960Uncertainty assigned by TRC = 0.3 K; TRC
Tfus257.93KN/ACoulson, Cox, et al., 1959Uncertainty assigned by TRC = 0.03 K; TRC
Quantity Value Units Method Reference Comment
Ttriple258.57KN/AChirico, Hossenlopp, et al., 1994Uncertainty assigned by TRC = 0.01 K; TRC
Quantity Value Units Method Reference Comment
Tc655.4KN/AMajer and Svoboda, 1985 
Tc655.45KN/AAmbrose, Cox, et al., 1960Uncertainty assigned by TRC = 0.3 K; vis, PRT, IPTS-48, with decomp.; TRC
Tc655.45KN/ACox, 1960Uncertainty assigned by TRC = 1. K; measured by R. Townsend to be pub. later; TRC
Quantity Value Units Method Reference Comment
Δvap47.74kJ/molN/AMajer and Svoboda, 1985 
Δvap52.0 ± 0.6kJ/molGSVerevkin, 1999Based on data from 283. - 313. K.; AC
Δvap47.6kJ/molCGCChickos, Hosseini, et al., 1995Based on data from 323. - 373. K.; AC
Δvap48.95kJ/molVCox, 1960ALS

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
39.08434.4N/AMajer and Svoboda, 1985 
45.2340.EBSteele, Chirico, et al., 1995Based on data from 328. - 476. K.; AC
42.7380.EBSteele, Chirico, et al., 1995Based on data from 328. - 476. K.; AC
40.2420.EBSteele, Chirico, et al., 1995Based on data from 328. - 476. K.; AC
37.4460.EBSteele, Chirico, et al., 1995Based on data from 328. - 476. K.; AC
43.0387.AStephenson and Malanowski, 1987Based on data from 372. - 436. K. See also Kkykj and Repas, 1973.; AC
46.9313.CMajer, Svoboda, et al., 1985AC
45.0343.CMajer, Svoboda, et al., 1985AC
43.5368.CMajer, Svoboda, et al., 1985AC

Enthalpy of vaporization

ΔvapH = A exp(-βTr) (1 − Tr)β
    ΔvapH = Enthalpy of vaporization (at saturation pressure) (kJ/mol)
    Tr = reduced temperature (T / Tc)

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Temperature (K) A (kJ/mol) β Tc (K) Reference Comment
313. - 368.64.960.2902655.4Majer and Svoboda, 1985 

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Reference Comment
13.48258.6Chirico, Hossenlopp, et al., 1994, 2AC

Temperature of phase transition

Ttrs (K) Initial Phase Final Phase Reference Comment
47.350crystaline, IIcrystaline, ISteele, Chirico, et al., 1986DH
258.565crystaline, IliquidSteele, Chirico, et al., 1986DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


IR 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: Coblentz Society, Inc.

Condensed Phase Spectrum

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IR spectrum
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Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

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Owner COBLENTZ SOCIETY
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin DOW CHEMICAL COMPANY
Source reference COBLENTZ NO. 1859
Date Not specified, most likely prior to 1970
Name(s) 2,3-LUTIDINE
State SOLUTION (10% CCl4 FOR 5000-1330, 10% CS2 FOR 1330-625 CM-1)
Instrument Not specified, most likely a prism, grating, or hybrid spectrometer.
Path length 0.0119 CM, 0.0115 CM
SPECTRAL CONTAMINATION DUE TO CS2 AROUND 850, AND CCl4 AROUND 1550 CM-1
Resolution 4
Sampling procedure TRANSMISSION
Data processing DIGITIZED BY NIST FROM HARD COPY

This IR spectrum is from the Coblentz Society's evaluated infrared reference spectra collection.


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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Mass spectrum
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Additional Data

View image of digitized spectrum (can be printed in landscape orientation).

Due to licensing restrictions, this spectrum cannot be downloaded.

Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin Japan AIST/NIMC Database- Spectrum MS-NW- 435
NIST MS number 227866

All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.


References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Notes

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

Cox and Gundry, 1958
Cox, J.D.; Gundry, H.A., Heats of combustion. Part II. The six lutidines, J. Chem. Soc., 1958, 1019-1022. [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]

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [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]

Kyte, Jeffery, et al., 1960
Kyte, C.T.; Jeffery, G.H.; Vogel, A.I., Physical Properties and Chem. Constitution XXVII. Pyridine Derivatives, J. Chem. Soc., 1960, 1960, 4454. [all data]

Hackmann, Wibaut, et al., 1943
Hackmann, J.Th.; Wibaut, J.P.; Gitsels, H.P.L., Basic N compounds from cracked distillates of California petroleum, Recl. Trav. Chim. Pays-Bas, 1943, 62, 229. [all data]

Coulson, Cox, et al., 1959
Coulson, E.A.; Cox, J.D.; Herington, E.F.G.; Martin, J.F., The Preparation and Physical Properties of the Pure Lutidines, J. Chem. Soc., 1959, 1959, 1934. [all data]

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]

Ambrose, Cox, et al., 1960
Ambrose, D.; Cox, J.D.; Townsend, R., The critical temperatures of forty organic compounds, Trans. Faraday Soc., 1960, 56, 1452. [all data]

Cox, 1960
Cox, J.D., The second virial coefficients, latent heats of vaporization and heats of formation of the lutidines, Trans. Faraday Soc., 1960, 56, 959. [all data]

Verevkin, 1999
Verevkin, Sergey P., Strain Effects in Phenyl-Substituted Methanes. Geminal Interaction between Phenyl and the Electron-Releasing Substituent in Benzylamines and Benzyl Alcohols, J. Chem. Eng. Data, 1999, 44, 6, 1245-1251, https://doi.org/10.1021/je990118z . [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]

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]

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]

Kkykj and Repas, 1973
Kkykj, J.; Repas, M., Petrochemia, 1973, 13, 179. [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]

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]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), References