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SPONTANEOUS HYDROGEN TRANSFER UPON IONIZATION: UV/VIS AND IR-SPECTROSCOPY OF ENOL RADICAL CATIONS FROM IONIZED O-CARBONYLTOLUENES IN ARGON MATRICES

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/18662

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Title: SPONTANEOUS HYDROGEN TRANSFER UPON IONIZATION: UV/VIS AND IR-SPECTROSCOPY OF ENOL RADICAL CATIONS FROM IONIZED O-CARBONYLTOLUENES IN ARGON MATRICES
Creators: Tang, Weilin; Bally, Thomas
Issue Date: 1993
Abstract: It was recently shown that aromatic carbonyl compounds carrying an alkyl group in the ortho position undergo spontaneous hydrogen transfer upon ionization to form the more stable enol radical cations [1]. We have investigated the ``parent system'' of this class of molecules, o-methylbenzaldehyde, in some detail by matrix isolation UV/VIS and IR-speciroscopy. [FIGURE] The resulting enol radical cation is present in the form of several rotamers, some of which can be interconverted by selective photolyses. Three of the four possible rotamers were observed and identified by means of fitting quantum chemical force fields to the observed IR (difference) spectra. The resulting assignment is in agreement with theoretical predictions of the shifts in the UV/VIS spectra.
URI: http://hdl.handle.net/1811/18662
Other Identifiers: 1993-TG-5
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