15min:

ERIK M. GRUMSTRUP, GALEN SEDO AND KENNETH R. LEOPOLD, Department of Chemistry, University of Minnesota, Minneapolis, MN 55455.

Microwave spectra have been recorded for the complex O₂-HF. Spectra were readily located based on results of previous infrared work. but yield spectroscopic constants of somewhat higher accuracy. The observed transitions show well resolved structure arising from the ¹H and ¹⁹F nuclear spins. Magnetic super-hyperfine structure due to the interaction of the proton and fluorine nuclei with the spin magnetic moment of O₂ appear to be of comparable magnitude to the HF spin-spin interaction in at least some of the observed transitions. Progress on the simultaneous analysis of these hyperfine and super-hyperfine effects will be reported.