Rovibrational analysis of asymmetric top molecules in vibrationally excited states by high-resolution FTIR spectroscopy

Abstract

Spectral analyses to obtain spectroscopic as well as coupling constants have been made in order to fit the vibrational-rotational energy levels and study the vibrational-rotational structure of some gaseous asymmetric top molecules. Rotationally resolved spectra with a spectral resolution of 0.004 cm-1 collected using the Bomem DA3.002 High-resolution Fourier transform spectrometer have been fitted to the well established Watson's Hamiltonian including rovibrational coupling terms in order to derive precise upper state spectroscopic constants.