The Infrared Spectra of BF_3 Cation and BF_2OH Cation Trapped in Solid Neon

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Radicals And Ions

Scientific paper

New, more detailed studies of the photoionization and Penning ionization of BF_3 trapped in solid neon have confirmed the earlier infrared spectroscopic identification of BF_2 and BF_2 cation and have yielded a revised assignment for the infrared absorptions of BF3 cation. The position of the absorption attributed to ν_3 of that molecule is consistent with the distortion of the ground-state cation from D3h symmetry because of strong vibronic interaction between levels of the Btilde ^2E^' state and E^' levels of the ~X ^2A_2^' ground state, as predicted by Haller and co-workers. The facile reaction of BF_3 with traces of H_2O desorbed from the walls of the vacuum system leads to the stabilization of sufficient BF_2OH for the identification of two vibrational fundamentals of BF_2OH cation.
M. E. Jacox and W. E. Thompson, J. Chem. Phys. 102, 4747 (1995).
E. Haller, H. Koppel, L. S. Cederbaum, W. von Niessen, and G. Bieri, J. Chem. Phys. 78, 1359 (1983).

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