The subtle electronic effects of alkyl groups on the conformational equilibria and intramolecular hydrogen-bond strength in cis-3-alkoxycyclohexanols
作者:Paulo R. de Oliveira、Roberto Rittner
DOI:10.1016/j.saa.2007.10.016
日期:2008.10
1H NMR data for cis-3-n-propoxycyclohexanol (cis-3-PCH) and cis-3-isopropoxy-cyclohexanol (cis-3-ICH) show that a concentration increase shifts the conformational equilibrium from the diaxial (aa) conformer, stabilized by an intramolecular hydrogen bond (IAHB), to the diequatorial (ee) conformer [Xee=42% and 21% (at 0.01 mol L(-1)) to 58% and 56% (at 0.40 mol L(-1)), in CCl4, respectively] due to intermolecular