Inductive Effect and Greek letter assignmentpresence of an aldehyde in a sample compound: an aldehyde will become a carboxylic acid
when reacted with Tollens’ reagent, but a ketone will not react. when aldehydes react with
fehling solution a red precipitate is obtained (due to formation of Cu 2 O).
86.6 Inductive Effect and Greek letter assignment
The carbonyl group is very electron withdrawing, and adjacent carbons are effected by
induction. Using the carbonyl group as a reference, adjacent carbons are named using
Greek letters in order of closeness to the carbonyl group. Alpha (α) carbons are directly
attached to the carbonyl group, beta (β) carbons are connected to alpha carbons, gamma
(γ) to beta (β), and so on.
Due to the inductive effect of the partial positive charge on the carbonyl carbon of a keytone
or aldehyde, as well as the stabilizing resonance of the double bond between the hydroxyl
group and conjugated carbons to the carbonyl group, the alpha (α) hydrogens are especially
acidic, meaning they are especially prone to removal.
id:Kimia Organik/Keton dan aldehida^2
2 https://id.wikibooks.org/wiki/Kimia%20Organik%2FKeton%20dan%20aldehida