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Argon hydrochloride, Ar.HCl, bond energy by infrared spectroscopyThe infrared absorption of argon (200 to 760 torr) and hydrogen chloride (2 to 6 torr) mixtures is reexamined in the missing Q branch region (spectral region between 2860 and 3010 wavelength/cm) at temperatures ranging from 195 to 298 K. The temperature dependence of two absorption features of the argon hydrogen chloride complex, at 2887 and 2879 wavelength/cm, leads to a bond energy estimate that depends on the assumptions made about the internal degrees of freedom of the complex. It is shown that agreement with experiment can be reached for well depths near 1.2 kcal/mole. This result is relatively insensitive to the choice of the vibrational frequencies and anharmonicities, but does depend on the extent to which the energy level manifolds are truncated to avoid molecular excitation in excess of the bond energy. The bond energy is found to deviate from the commonly accepted value of 0.4 kcal/mole. Possible causes for the discrepancy are considered.
Document ID
19770033227
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Miziolek, A. W.
(California Univ. Berkeley, CA, United States)
Pimentel, G. C.
(California, University Berkeley, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
December 1, 1976
Publication Information
Publication: Journal of Chemical Physics
Volume: 65
Subject Category
Inorganic And Physical Chemistry
Accession Number
77A16079
Distribution Limits
Public
Copyright
Other

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