Characterization of association in pyridine vapor by measurement of thermal conductivity [electronic resource].
- Argonne, Ill. : Argonne National Laboratory, 1979.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: 25 : digital, PDF file
- Additional Creators:
- Argonne National Laboratory
United States. Department of Energy. Office of Scientific and Technical Information
- The thermal conductivity of pyridine vapor has been measured as a function of pressure in the range 100 to 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/sup -1/ and -22.2 cal deg/sup -1/mol/sup -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.
- Published through SciTech Connect.
16. international thermal conductivity conference, Chicago, IL, USA, 7 Nov 1979.
Blander, M.; Curtiss, L.A.; Frurip, D.J.; Horowitz, C.
- Funding Information:
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