the rotational barrier in ethane: a molecular orbital study
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2012
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Abstract
The energy change on each Occupied Molecular Orbital as a function of rotation about the C-C bond in ethane was studied using the B3LYP, mPWB95 functional and MP2 methods with different basis sets. Also, the effect of the ZPE on rotational barrier was analyzed. We have found that σ and π energies contribution stabilize a staggered conformation. The σ<sub>s</sub> molecular orbital stabilizes the staggered conformation while the stabilizes the eclipsed conformation and destabilize the staggered conformation. The π<sub>z</sub> and molecular orbitals stabilize both the eclipsed and staggered conformations, which are destabilized by the π<sub>v</sub> and molecular orbitals. The results show that the method of calculation has the effect of changing the behavior of the energy change in each Occupied Molecular Orbital energy as a function of the angle of rotation about the C–C bond in ethane. Finally, we found that if the molecular orbital energy contribution is deleted from the rotational energy, an inversion in conformational preference occurs.
| Reference Key |
mena-rejn2012moleculesthe
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| Authors | ;Gonzalo J. Mena-Rejón;Gabriel Cuevas;Mariana Quesadas-Rojas;Ramiro F. Quijano-Quiñones |
| Journal | Journal of ethnopharmacology |
| Year | 2012 |
| DOI |
10.3390/molecules17044661
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