Question

In the following reaction
Aldehyde + Alcohol $\xrightarrow{HC\ell} $ Acetal
Aldehyde Alcohol
$HCHO{}^{ t}BuOH$
$CH_3CHO MeOH$
The best combinations is :

• A. $HCHO$ and $MeOH$
• B. HCHO and ${}^{t}BuOH$
• C. $CH_3CHO$ and MeOH
• D. $CH_3CHO$ and ${}^{t}BuOH$

Answer 1

Answer: (A)

rate $\propto \frac{1}{\text { steric crowding of aldehyde }}$
t-butanol can show formation of carbocation in acidic medium.