The influence of chirality in the amide side chain on the carbonyl orientation in rotational isomers of 3-carbamoylpyridinium halides
Abstract
The direction of the carbonyl orientation in solid amide rotamers of 3-(N-methyl-N-α-methylbenzylcarbamoyl)-1,2,4-trimethylpyridinium iodide is governed by the (R)- or (S)-chirality in the amide side chain; X-ray structures and c.d. spectra are correlated.