Publication
Title
Orientational diffusion of methyl groups in crystalline $CH_{3}F:$ an infrared study
Author
Abstract
 The mid-infrared (4000-400 cm(-1)) spectra of polycrystalline methyl fluoride have been investigated at temperatures between 8 and 85 K. Least-squares band fitting was performed for all fundamental bands belonging to symmetric and asymmetric vibrations of the methyl group, and the contributions of inhomogeneous broadening and vibrational and orientational relaxation to the bandwidths have been evaluated. From the temperature dependence of the bandwidths, using the modified Rakov approach, the activation enthalpy, Delta H*, and activation entropy, Delta S*, for orientational diffusion of the methyl groups have been determined to be Delta H* = 0.85(7) kJ mol(-1) and Delta S* = -7(1) J mol(-1) K-1.
Language
English
Source (journal)
The journal of physical chemistry : A : molecules, spectroscopy, kinetics, environment and general theory. - Washington, D.C., 1997, currens
The journal of physical chemistry : B : materials, surfaces, interfaces and biophysical. - Washington, D.C., 1997, currens
Publication
Washington, D.C. : 1998
ISSN
1089-5639 [print]
1520-5215 [online]
Volume/pages
102(1998), p. 6493-6498
ISI
000075786400009
Full text (Publisher's DOI)
UAntwerpen
 Faculty/Department Research group Publication type Subject Affiliation Publications with a UAntwerp address