Étude Par Spectrométrie de Vibration, de L'Interaction Entre Les Halogénures de Trialkylammonium et Quelques Dérivés Phénoliques. II. Vibration v_NH⁺

Abstract

The vibrational spectrum of Et3N H+ C1-and Et3N H+ Br-has been examined in the vNH+ range. doublet while the infrared band profile is very large and shows a resonance window fixed at 2 5 1 0 cm-l. dissolved in 1,2 dichloroethane. The formation of hydrogen bonded complexes between the anions C1-or Br-and some phenol derivatives brings about a frequency shift of the vNH+ band toward higher wavenumbers. depends on the acidity of the phenol derivative and on its concentration. For these complexes, a window also appears at 2 5 1 0 cm-'; this negative absorption probably arises from a Fermi resonance with the rocking vibration of the methyl group.In the solid state, the Raman spectrum shows a well-defined non complexdes, nous a conduit P 6tudier celui-ci soit P l'dtat solide, soit en solution dans le dichlorodthane 1 , 2 (DCE)-329 -