(HCNO)-C-13-N-14: Independent parameters describing the Coriolis resonance systems (00002)/(00010) and (00012)/(00020)

In previous publications the resonances between the vibrational levels (v(1)v(2)v(3)v(4)v(5))(k) = (00002)(0e) and (00010)(1e), the first Coriolis resonance system, and between the levels (00012)(u)(1e,f), (00020)(0,e) and (00020)(2e,f), the second Coriolis resonance, in the infrared, microwave, and millimeter-wave spectra of (HCNO)-C-13-N-14 were analyzed and/or discussed. However, some problems in the fits of the rovibrational data to an effective Hamiltonian derived for a linear molecule remained. In the present paper, the new model proposed by G. Wagner, B. P. Winnewisser, M. Winnewisser, and K. Sarka, J. Mol. Spectrosc. 162, 82-119 (1993), taking account of the Coriolis resonance between the levels (00002)(2e,f) and (00010)(1e,f) for the first resonance system and between the levels (00012)(3ef) and (00020)(2ef), and between (00012)(l)(1e) and (00020)(0e) for the second resonance system is applied to (HCNO)-C-13-N-14. Furthermore, the IR, MW, and mmW data obtained from the spectra of (HCNO)-C-13-N-14 are used to check the relationships between the Coriolis parameters defining the coupling terms for the first and second Coriolis resonance systems, which were derived for a linear molecule by Wagner et al. Different approximations for these relations are discussed. A set of independent parameters is defined together with criteria to determine the most meaningful set of values of the parameters describing the two resonance systems. Our analysis shows the limits of the current model of a linear molecule in describing such resonances occurring in the spectra of the quasilinear molecule (HCNO)-C-13-N-14. (C) 1996 Academic Press, Inc.