Characterization of Association in Pyridine Vapor by Measurement of Thermal Conductivity

  • L. A. Curtiss
  • D. J. Frurip
  • C. Horowitz
  • M. Blander


The thermal conductivity of pyridine vapor has been measured as a function of pressure in the range 100–500 torr at four temperatures (366.2, 371.1, 376.7, and 386.6 K) in a thick hot wire cell using a relative technique. The thermal conductivity increases linearly with pressure (4.3% over one atmosphere pressure at 376.7 K). Analysis of the data in terms of dimer formation in the vapor using the Butler-Brokaw expression leads to an enthalpy and entropy of association of −4.93 kcal mol−1 and −22.2 cal deg−1mol−1, respectively. Ab initio molecular orbital calculations using a minimal basis set on five possible structures for the pyridine dimer tentatively indicate that the most stable structure has a linear N....H-C hydrogen bond with the planes of the two pyridine molecules perpendicular to each other.Work performed under the auspices of the Material Sciences Program of the Division of Basic Energy Sciences of the Department of Energy Undergraduate Student Participant from Harvey Mudd College, Claremont, California.


Thermal Conductivity Molecular Orbital Calculation Pyridine Molecule Thermal Conductivity Data Experimental Thermal Conductivity 
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Copyright information

© Purdue Research Foundation 1983

Authors and Affiliations

  • L. A. Curtiss
    • 1
  • D. J. Frurip
    • 1
  • C. Horowitz
    • 1
  • M. Blander
    • 1
  1. 1.Chemical Engineering DivisionArgonne National LaboratoryArgonneUSA

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