Abstract
The rotational spectrum of FClO2 was studied by microwave Fourier transform (MWFT) spectroscopy for both the 35Cl and 37Cl isotopomers between 13.2 and 18.3GHz. Conventional absorption spectroscopy was used to investigate selected regions between 69 and 867GHz. Infrared spectra of six FClO2 isotopomers containing 35/37Cl and 16/18O and isolated in neon and argon matrices were studied between 80 and 4000cm−1. 35/37Cl and 19F hyperfine splitting was resolved in the microwave region, and the complete Cl nuclear quadrupole tensor as well as diagonal elements of the Cl and F spin-rotation tensors were determined for the first time. The spin-rotation constants were used to derive nuclear magnetic shielding tensors. The global fit of the present rotational data together with previous microwave transitions yielded improved and newly determined rotational and centrifugal distortion constants. The matrix-isolation data together with the quartic centrifugal distortion constants were used for a calculation of the harmonic force field.
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