allerySelf-aldol condensation of acetaldehyde, after dehydration, gives
AAcetone
BCrotonaldehyde (2-butenal)
CVinyl alcohol
Dn-Butanol
Answer & Solution
Correct answer: B. Crotonaldehyde (2-butenal)
$2\,CH_3CHO \to CH_3CH(OH)CH_2CHO$ (aldol) $\to CH_3CH=CHCHO$ (crotonaldehyde) after $\beta$-elimination of water.
The condensation step (dehydration) gives the $\alpha,\beta$-unsaturated carbonyl.
Keep practising Aldehydes, Ketones and Carboxylic Acids
Browse all Aldehydes, Ketones and Carboxylic Acids questions for ISC Class 12, or explore more Chemistry topics.
Related questions
The IUPAC name of the simplest aldehyde, $\mathrm{HCHO}$, isWhich of the following named reactions does **NOT** require an $\alpha$-hydrogen on the suMatch each named organic reaction to its description.The product of the Hunsdiecker reaction on $CH_3CH_2COOAg$ with $Br_2/CCl_4$ isMatch each named organic reaction to its description.Among $1$-butanol, $2$-butanol and $tert$-butanol, the order of reactivity in the Lucas te**Gatterman–Koch reaction** formylates benzene usingIn **Dow's process**, chlorobenzene is converted to phenol by treatment with