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Determination of the moment of inertia of methyl groups: Analysis of the millimeterwave spectra of cis-propanal and methylthioethyne |
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| Affiliation: | 1. Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany;2. Center for Advancing Electronics Dresden, TU Dresden, 01062 Dresden, Germany;3. Dresden Center for Computational Materials Science (DCMS), TU Dresden, 01062 Dresden, Germany |
| Abstract: | The ground state rotational spectra of methylthioethyne and cis-propanal have been investigated. An overall fit of the measurements using the Internal Axis Method has allowed us to accurately determine the internal rotation parameters. The moments of inertia of methyl groups obtained from an internal rotation analysis are reviewed. They are compared to the values calculated using two empirical correlations found by McKean: between the isolated stretching frequencies and the corresponding CH bond lengths or the HCH angles. |
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