Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 74, Issue 21, Pages 8384-8387Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jo901705p
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- CNPq
- FAPEMIG
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The rotational barrier and conformer energies of butane are well-known, but the contributing effects to its conformational isomerism are Still Unclear. Calculated potential energy surfaces for the relaxed and vertical (bond distances and angles frozen) structures, together with NBO, analysis, Suggest that approaching or distancing methyl groups involve: substantial energy costs between the gauche and anti isomers, while hyperconjugative interactions play an important, but not prevalent, role for the conformational isomerism of butane.
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