The observation of hot bands in the 288 nm system of the FeCl2 radical |
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Authors: | Philip J Hodges John M Brown Stephen H Ashworth |
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Institution: | aPhysical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, UK;bThe School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich NR4 7TJ, UK |
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Abstract: | The 288 nm band system of FeCl2 has been recorded with a sample produced in a warmed, free-jet expansion at moderately high resolution (with a linewidth of 0.28 cm−1). Under these conditions, several hot bands are observed involving excitation of the symmetric and anti-symmetric stretching vibrations. The wavenumbers determined as a result for FeCl2 in its ground 5Δg,4 state are and . No hot, sequence bands in the bending vibration were observed. The most likely explanation is that the wavenumber for ν2 is essentially the same in both the electronic states involved (88 cm−1). Additional strong hot bands are observed that are unrelated to the previously assigned electronic transitions; they appear to emanate from a low-lying electronic state of FeCl2. |
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Keywords: | Electronic spectroscopy Transition metal compounds Iron dichloride Hot bands Vibrational intervals |
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