Chemistry - Carboxylic acid and their Derivatives Question with Solution | TestHub

t-butyl gp. has large size and does not let the $\mathrm{COOH}$ group to leave.

t-butyl gp. can't extract $\mathrm{H}$ from $\mathrm{COOH}$.

t-butyl gp. stabilise carbanion formed.

t-butyl gp. does not allow this composition to convert to $\beta$ - $\gamma$-unsaturated acid