The Fourier-transform absorption spectrum of nitrosobenzene vapour in the near-infrared has been recorded, and the vibrational bands near the 869 nm electronic origin of the A1A? ? X¯1A' (n,p*) transition have been re-analysed. The prominent torsional structure observed is shown to represent sequence transitions in the torsional mode. Electronic excitation leads to an increase of the V2 barrier hindering internal rotation from roughly 1300 cm-1 in the ground to 2500 cm-1 in the (n,p*) excited state. © 1985.
|Number of pages||6|
|Journal||Chemical Physics Letters|
|Publication status||Published - 13 Dec 1985|