Molecular Ions of Transient Species: Vinylamine‐Cation
1984; Wiley; Volume: 67; Issue: 1 Linguagem: Inglês
10.1002/hlca.19840670128
ISSN1522-2675
AutoresBruno Albrecht, Michael Allan, Edwin Haselbach, Louis Neuhaus, Pierre‐Alain Carrupt,
Tópico(s)Advanced Chemical Physics Studies
ResumoAbstract Vinylamine 1 was prepared by thermolysis of cyclobutylamine and its photoelectron spectrum was measured. I = 8.20 eV and I = 8.65 eV were found, the dominant vibrational progression (ṽ = 725 cm −1 ) indicating that in the course of 1(X)→1 + ( X̃ ) flattening around the N‐atom occurs. The Franck‐Condon profile of this band, however, suggests that a skeletal mode of ṽ ≈ 1400 cm −1 (observed also in the iso‐π‐electronic systems vinyl‐alcohol‐cation and allyl radical) may also be excited. Comparison with the data for the isomer acetaldehyde‐imine 2 and its cation s + shows that the isomer couple 1/2 constitutes a further notable example for a relative thermochemical stability inversion on going from the neutrals to the cations.
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