The Fermi doublet V2?V3 + V4 of CH3CN as a probe of molecular interactions |
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Authors: | José Fernández Bertrán Boris La Serna Klaus Doerffel Klaus Dathe Gunther Kabish |
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Institution: | Centro Nacional de Investigaciones Científicas, Apartado 6990 La Habana, Cuba;Technical University, Merseburg, German Democratic Republic;Saxonian Academy of Science, Freiberg, German Democratic Republic |
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Abstract: | The Fermi doublet V2?V3 + V4 of CH3CN in basic, inert and acidic solvents has been studied by IR and Raman spectroscopy. The values of W, the Fermi coupling coefficient, obtained from IR spectra varies with the nature of the solvent while W evaluated from Raman data remains constant at 12.5 ± 0.5 cm?1. The similar effects of Bronsted and Lewis acids on the band frequencies and intensities is evidence that the CN group complexes with acids via the N atom “n” electron pair and not the π bond. |
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