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Association and Fermi resonance of the simplest liquid primary aliphatic amines and their N-deutero analogues

1980; Pergamon Press; Volume: 36; Issue: 10 Linguagem: Inglês

10.1016/0584-8539(80)80041-9

1873-3824

H. Wolff, Udo Schmidt, E. Wolff,

Advanced Chemical Physics Studies

The i.r. spectra of liquid CH3ND2, C2H5ND2 and n-C3H7ND2 in the region of ND2 stretching vibrations are compared to the spectra of the non-deuterated analogues in the region of NH2 stretching vibrations. The observations in the spectra and the results of a Fermi resonance analysis are compatible with the interpretation that the symmetric ND2 stretching vibration and the overtone of the ND2 deformation vibration of the simple primary amines cross over with self-association. CF3CH2NH2 and CF3CH2ND2 having been investigated as models for the amine association show such a behavior only for the mixed association with strong acceptors.