Abstract
We follow the changes of the chemical shifts of both the methylen groups and of the methyl group in esters of the type R-CH2-COO-CH2-CH3, R-CH2-COS-CH2-CH3, R-CH2-CSO -CH2 -CH3, and R -CH2 -CSS -CH2 -CH3. In passing from the normal ester to the thiol, thion, and dithio ester the chemical shifts of the groups mentioned change by characteristic amounts independent from R for the investigated systems. Deviations from the increment system are discussed.
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