By a proper choice of reagent, both symmetrical and unsymmetrical ethers can by prepared by williamson synthesis which involves the reaction between an alkyl halide and an alkoxide ion. The reverse process involving the cleavage of etehrs to give back the original alkyl halide and the alcohol can be carried out by heating the ether with HI at 373K. Q. Which of the following ethers is not cleaved by HI?

By a proper choice of reagent, both symmetrical and unsymmetrical ethe

1.	By a proper choice of reagent, both symmetrical and unsymmetrical ethers can by prepared by williamson synthesis which involves the reaction between an alkyl halide and an alkoxide ion. The reverse process involving the cleavage of etehrs to give back the original alkyl halide and the alcohol can be carried out by heating the ether with HI at 373K. Q. Which of the following ethers is not cleaved by HI?
Answer» Dicyclohexyl ether Phenetole di-tert-butyl ether Diphenyl ether Solution : DUE to resonance C-O BOND has some double bond CHARACTER and hence is not cleaved by HI.