The problem of planar vs. boat-shaped 1, 4-cyclohexadiene ring systems is attended to
through the conformational analysis of restricted, rigid systems such as cis-and trans-methyl …

Cyclohexane and hetero-analogs of cyclohexane, such as 1, 3-dioxane, 1, 3-dithiane, etc.
present relatively rigid frameworks' in which the effect of substituents and heteroatoms, x., on …

Gas—phase high resolution NMR is a potentially useful new tool for the study of rotational
isomerism. The methods of measurement are explained, with the care necessary for sample …

The chemical shift (solvent carbon disulphide) of the ring hydrogen atoms of 74 alkyl
substituted 1, 3-dioxanes is given in tabular form. The effect of alkyl groups (methyl, ethyl, n …

The aromatic carbon-13 chemical shifts of the methylated benzenes are analyzed in terms of
the conformational states of the methyl rotors and associated steric, dynamic, and electronic …

The static and dynamic stereochemistry of vinyl propellers Ar3Ar2C= C (X) Ar*(2) was
analyze* and compared with those for the Ar'Ar2Ar3Z (3) and Ar'Ar2Ar3ZX (4) molecular …

cfs-l-Mesityl-2-phenylcyclopentane (ci's-I) has been found to undergo rotation of the mesityl
ring slowly enough to permit detection by a change in nmr line shape atlow temperatures. At …

The vicinal coupling constant, J (12), between the vinyl CH and the ring CH protons in
vinylcyclohexane was calculated from a 'partial molecule'six‐spin system. The 100 and 270 …

The NMR spectra of several 1, 2‐disubstituted propanes, particularly 1, 2‐dichloropropane
and 1, 2‐dibromopropane, are examined in detail in various media. A range of vicinal J …

RESULTS AND DISCUSSION In deriving the general expectations for the nmr spectra of
liquids (or dissolved) ethanes, the molecules have been divided into six classes: the …