Description
| Abstract: | Cyclopenetene and cyclopentane are the basic examples of two types of five-membered ring molevules. Cyclopentene represents the class of molecules referred to as pseudo-four-membered rings. Cyclopentane is the classic example of a pseudorotating molecule. The study of the two out-of-plane ring vibrations of these molecules can provide information about the conformations of the molecules. The motion of cuclopentene during the ring puckering vibration was investigated by a one-dimensional reanalysis of the puckering data of deuterated cyclopentenes. The ring puckering data was analyzed by the inclusion of kinetic energy expansions in the Hamiltonian. A basic bisector model and a model incorporating various amounts of CH₂ rocking were used in calculating the kinetic energy expansions. The inclusion of the kinetic energy expansion improved the fit considerably between observed and calculated frequencies. The inclusion of rocking also improved the frequency fit but the improvement was relatively insensitive to the actual rocking parameters. It was concluded that the basic bisector model was the best model for the ring puckering vibrations of cyclopentene. The reduced masses calculated using the bisector model fit the observed isotopic shift very well and the puckering of the four isotopic cyclopentenes could be fairly well with the potential function, V=7.62x10⁵x⁴-26.1x10³x².. |
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| Item Description: | Vita.
"Major subject: Chemistry." |
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| Physical Description: | xv, 212 leaves : illustrations, graphs ; 28 cm |
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| Bibliography: | Includes bibliographical references (leaves 209-211). |
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