Conformational characteristics of 1r,2t-dimethoxy-4c-methylcyclohexane. The nonadditivity of the conformational energy of the methyl group
It is usually considered that nonpolar alkyl substituents do not interact with other sufficiently distant groups. Therefore, the introduction of a methyl group into the molecule is sometimes used as a means for displacing the conformational equilibria of substituted cyclohexanes by a strictly defined amount. The authors have checked the accuracy of such an approach by comparing the conformational equilibria of trans-1,2-dimethoxycyclohexane and 1r,2t-dimethoxy-4c-methylcyclohexane. The ratio of the conformers was established by measuring the integral intensities of their signals in the low-temperature /sup 13/C NMR spectra. The spectra were measured on a Varian FT-70 spectrometer at 20 MHz with /sup 13/C-//sup 1/H/ proton decoupling.
- Research Organization:
- M. V. Lomonosov Moscow State Univ. (USSR)
- OSTI ID:
- 7076406
- Journal Information:
- J. Org. Chem. USSR (Engl. Transl.); (United States), Journal Name: J. Org. Chem. USSR (Engl. Transl.); (United States) Vol. 23:5; ISSN JOCYA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ALCOHOLS
ALKANES
CARBON 13
CARBON ISOTOPES
CHEMICAL REACTIONS
CHEMICAL SHIFT
CONFORMATIONAL CHANGES
CYCLOALKANES
CYCLOHEXANE
DEUTERATION
DEUTERIUM COMPOUNDS
ENERGY
EQUILIBRIUM
EVEN-ODD NUCLEI
FREE ENERGY
HYDROCARBONS
HYDROGEN 1
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
HYDROXY COMPOUNDS
ISOMERIZATION
ISOMERS
ISOTOPE EFFECTS
ISOTOPES
LIGHT NUCLEI
METHANOL
METHYLATION
METHYLENE CHLORIDE
NMR SPECTRA
NUCLEI
ODD-EVEN NUCLEI
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC SOLVENTS
PHYSICAL PROPERTIES
SOLVENTS
SPECTRA
STABLE ISOTOPES
STRUCTURAL CHEMICAL ANALYSIS
THERMODYNAMIC PROPERTIES