Electronic absorption spectra of the halogenocyanoacetylene cations in neon matrices
Abstract
The optical absorption spectra of the B2Π3/2â†�X2Π3/2 electronic transitions of chloro-,bromo- and iodo-cyanoacetylene cations have been measured in neon matrices at 4.5 K. In the case of the chloro species, the Ã2Σ+â†�X2Π3/2 transition is also observed. The spectra are analysed vibrationally and yield some of the fundamental vibrational frequencies of these cations in their excited electronic states.