The anharmonic force constant K234 of CH3CN in different phases,solvents and complexes with Lewis acids |
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Institution: | 1. Department of Chemical Engineering, Biotechnology, and Materials, Universidad de Chile, Beauchef 851, 8370448 Santiago, Chile;2. Centre for Biotechnology and Bioengineering, Universidad de Chile, Beauchef 851, 8370448 Santiago, Chile;3. Institute for Cell Dynamics and Biotechnology, Beauchef 851, 8370456, Santiago, Chile |
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Abstract: | The Fermi coupling coefficient W and the anharmonic force constant K234 of CH3CN have been determined from i.r. and Raman studies of the v2—v3+v4 Fermi doublet in liquid and gaseous phases, solutions in inert, basic and acidic solvents and in crystalline complexes with Lewis acids. The values of these parameters have been calculated by a modification of the Winther method. This method is also applied to gas phase data of the isotopic speices 13CH3CN, CH3 13CN and CH3C15N. Values of W are approximately 13±1 cm−1 except for basic and inert solvents where they are approximately 18 cm−1. |
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