Conformational preferences of 2-methoxy, 2-methylthio, and 2-methylselenocyclohexyl-N,N-dimethylcarbamate: a theoretical and experimental investigation.

Abstract

Studies on the conformational equilibria of 2-methoxy, 2-methylthio, and 2-methylselenocyclohexyl-N,N-dimethylcarbamate are reported. DNMR spectroscopy experiments at 203 K provided the percentages of each conformer in equilibrium. Theoretical calculations using the MP2, B3LYP, and B971 methods with cc-pVDZ basis set were applied to determine the differences in energy between the conformers. The analysis of the potential energy surface (PES) for each conformer showed the presence of two rotamers. NBO analysis provided an explanation of the factors (hyperconjugative and steric interactions) that drive rotamer and conformer preferences.

Cite this paper

@article{Cedran2007ConformationalPO, title={Conformational preferences of 2-methoxy, 2-methylthio, and 2-methylselenocyclohexyl-N,N-dimethylcarbamate: a theoretical and experimental investigation.}, author={Jaime C Cedran and Francisco P Dos Santos and Ernani Abicht Basso and Cl{\'a}udio F Tormena}, journal={The journal of physical chemistry. A}, year={2007}, volume={111 45}, pages={11701-5} }