# EXPERIMENTAL STUDIES OF THE ASYMMETRICALLY DEUTERATED METHOXY RADICALS WITH THE FASSST TECHNIQUE

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 Title: EXPERIMENTAL STUDIES OF THE ASYMMETRICALLY DEUTERATED METHOXY RADICALS WITH THE FASSST TECHNIQUE Creators: Melnik, Dmitry G.; Stakhursky, Vadim; Lozovsky, Vladimir A.; Miller, Terry A.; Moore, C. Bradley; De Lucia, Frank C. Issue Date: 2004 Publisher: Ohio State University Abstract: Asymmetrically deuterated methoxy radicals were experimentally studied in a direct absorption experiment using the pulsed jet FASSST $spectrometer^{a}$ in the range of 153-251 GHz. The radical species were produced in a gas discharge in a supersonic jet by a Stark-free coaxial electrode arrangement, mounted on a top of the nozzle. Observed transitions were attributed to methoxy only if they satisfied the following criteria: i) originated from a transient species, observable only under discharge conditions; ii) appeared in spectra recorded with both precursors used (methanol and methyl nitrite); iii) matched no reported transitions in other molecules (e.g. formaldehyde) found in discharge; iv) exhibited paramagnetic properties. The spectra were assigned by comparison of the experimentally obtained pattern with ones produced by the SpecView program using the $available^{b}$ Hamiltonian and molecular constants with a subsequent fit of the experimental data to the theoretical model. Description: $^{a}$D.Melnik, S.Gopalakrishnan, T.A.Miller, S.P.Belov and F.C.De Lucia, J.Chem.Phys., 114, 6100 (2001) $^{b}$I.Kalinovki, Laser Induced Fluorescence Spectroscopy of $CHD_{2}O$ and $CH_{2}DO$ and High Resolution Spectroscopy of $CH_{3}O$ and $HFCO$'', Ph.D. Thesis, U.of California, Berkeley, 2001 Author Institution: Dept. of Chemistry, Laser Spectroscopy Facility, The Ohio State University; Dept. of Physics, Microwave Laboratory, The Ohio State University URI: http://hdl.handle.net/1811/21538 Other Identifiers: 2004-WJ-09