Given below are two statements: one is labell | vedclass

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(A) Assertion $A$ is true: Acetals and ketals are essentially cyclic or acyclic ethers. Ethers are stable in basic medium because the nucleophilic att

Vedclass · Accepted Answer

$A$ is true but $R$ is false

Vedclass · Answer

(A) Assertion $A$ is true: Acetals and ketals are essentially cyclic or acyclic ethers. Ethers are stable in basic medium because the nucleophilic attack of $OH^-$ on the carbon atom is not favored due to the lack of a good leaving group and the electron-rich nature of the oxygen atom.Reason $R$ is false: Alkoxide ions $(RO^-)$ are strong bases and are considered poor leaving groups. The stability of acetals/ketals in basic medium is due to the fact that they do not undergo hydrolysis in the presence of bases,not because of the high leaving tendency of the alkoxide ion.

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