High-resolution infrared, microwave, and submillimeter-wave study of FClO2in the nu(2), nu(3), nu(4), and nu(6) excited states

A high-resolution analysis of the {nu (2), nu (3)} and {nu (4,) nu (6)} ban ds of the two isotopomers of chloryl fluoride (FClO2)-Cl-35 and (FClO2)-Cl- 37 has been carried out for the first time using simultaneously infrared sp ectra recorded around 16 mum and 26 mum with a resolution of ca. 0.003 cm(- 1) and microwave and submillimeter-wave transitions occurring within the vi brational states 2(1), 3(1), 4(1), and 6(1). Taking into account the Coriol is resonances which link the rotational levels of the {2(1), 3(1)} and the {4(1), 6(1)} interacting states, it was possible to reproduce very satisfac torily the observed transitions and to determine accurate vibrational energ ies and rotational constants for the upper states 2(1), 3(1), 4(1), and 6(1 ) of both the Cl-35 and Cl-37 isotopic species. (C) 2001 Academic Press.