Amine–Halogen Charge-Transfer Interactions: Vibrational Spectra and Intramolecular Potentials

Spectral data are presented for three acceptor complexes of trimethylamine and for two of their perdeuteroisotopes over the range 33–4000 cm−1. Data were taken both at 300° and 83°K over the near-infrared region. This has allowed a complete assignment of all intramolecular motions and the discovery...

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Bibliographic Details
Published in:The Journal of chemical physics 1968-01, Vol.49 (4), p.1840-1847
Main Author: Gayles, J. N.
Format: Article
Language:English
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Summary:Spectral data are presented for three acceptor complexes of trimethylamine and for two of their perdeuteroisotopes over the range 33–4000 cm−1. Data were taken both at 300° and 83°K over the near-infrared region. This has allowed a complete assignment of all intramolecular motions and the discovery of several of the weaker lattice intercombination frequencies. Data are reported in all three cases for low-lying degenerate bending motions in the frequency range 33–80 cm−1. The revised assignments reported here have permitted a complete description of the skeletal intramolecular potential which predicts properly the observed isotope effects. The model proposed suggests a revision of previous considerations regarding force fields in charge-transfer complexes. In particular, it is necessary to account for skeletal stretch–bend interactions.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.1670316