T. Nakanaga et al., INFRARED DEPLETION SPECTROSCOPY OF ANILINE DIMER CATION AND ANILINE-BENZENE CATION CLUSTERS, Journal of molecular structure, 413, 1997, pp. 205-209
The vibrational spectra of the NH stretching modes of the aniline dime
r cation and the aniline-benzene cluster cation have been measured by
infrared depletion spectroscopy, which utilizes infrared multiphoton d
ecomposition of the cluster ions and resonance-enhanced multiphoton io
nization-time-of-flight (REMPI-TOF) mass spectrometry. Two strong abso
rption bands were observed at 3440 and 3305 cm(-1) in the infrared spe
ctrum of the aniline-benzene cluster cation, while the infrared spectr
um of the aniline dimer cation exhibited only one strong peak at 3415
cm(-1) in the region between 3200 and 3600 cm(-1). A hydrogen bonded s
tructure between one of the NH bonds of the aniline cation and the ben
zene ring for the aniline-benzene cluster ion, and that between the NH
bond of the aniline cation and the lone pair of the nitrogen atom of
neutral aniline for the dimer cation have been proposed. (C) 1997 Else
vier Science B.V.