RENNER-TELLER INTERACTIONS IN THE ACETYLENE MOLECULE

The analysis of high resolution absorption spectra of the C2H2, C2D213C2H2 and C2HD molecules in the region 1205-1255 A has been achieved. The results, combined with available theoretical relations, have led to a complete interpretation of the features observed in that region in terms of several Renner-Teller interactions involving two close-lying electronic states, G and H, and the two bending vibrations of the molecule. Upper state parameters ɛ and ω satisfying isotopic relations, are derived from the interpretation. © 1979 Taylor & Francis Group, LLC.