THE ROVIBRATIONAL OVERTONE SPECTRUM OF (HCNO)-C-13 UP TO 3600 CM(-1) - A NETWORK OF RESONANCE SYSTEMS

The infrared spectrum of fulminic acid, (HCNO)-C-13, has been analyzed in the range 700-3600 cm(-1). More than 90 new vibrational levels hav e been identified. Power series coefficients of these levels are given . Every vibrational level and its rotational levels are locally or glo bally perturbed. It was possible to classify most of the interactions into a grand network of Coriolis- and/or Fermi-type resonance systems, similar to that described for the parent species (HCNO)-C-12, by usin g the previously known basic resonance systems 00010/00002 and 00100/0 0004. In addition, as for (HCNO)-C-12, another basic resonance for (HC NO)-C-13 was identified as 01000/00111, leading to the system 00015/01 000/00103/(00111), corresponding to a resonance involving the same sta tes in the parent species. As a consequence of the interactions, many so-called ''resonance-enbanced'' rovibrational subbands have been assi gned. The identification and partial analysis of the resonance systems have been carried out, first with the help of different representatio ns of reduced term values and second, by determining the J-value separ ation between e and f crossing points. The five main resonance systems will be discussed in this paper.