# SPECTROSCOPIC DETECTION OF THE HYDROTRIOXYL RADICAL (HOOO) IN THE GAS PHASE

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/30294

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 Title: SPECTROSCOPIC DETECTION OF THE HYDROTRIOXYL RADICAL (HOOO) IN THE GAS PHASE Creators: Suma, Kohsuke; Sumiyoshi, Yoshihiro; Endo, Yasuki Issue Date: 2005 Publisher: Ohio State University Abstract: Pure rotational spectra of the HOOO and DOOO radicals have been observed in a supersonic jet by using a Fourier transform microwave (FTMW) and FTMW-millimeter wave double resonance spectroscopy with a pulsed discharge nozzle. From a total of 12 observed rotational transitions with fine and hyperfine splittings, precise molecular constants have been determined. The experimentally determined molecular structure is $trans$ planar, which was not expected before the present experimental detection, since the large number of $ab$ $initio$ calculations so far reported have predicted its structure to be $cis$ planar. The determined bond length between the HO and O$_2$ moieties, HO-OO, is fairly long, 1.688 \AA, and the molecular structure of HOOO is similar to that of an isoelectronic radical, FOO, which also has a fairly long FO bond. Description: Author Institution: Department of Basic Sciences, Graduate School of Arts and Sciences,; The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan URI: http://hdl.handle.net/1811/30294 Other Identifiers: 2005-FD-14