Which of the following statement is incorrect with Williamson synthesis?
Secondary or tertiary alkyl halides gives better results of ether formation.
Williamson synthesis: \(\mathrm{R{-}X+R^\prime{-}ONa\rightarrow R{-}O{-}R^\prime+NaX}\), an \(\mathrm{S_N2}\) attack of the alkoxide on the alkyl halide; it gives both symmetrical and unsymmetrical ethers.
Alkoxides are strong bases as well as nucleophiles. With secondary and especially tertiary alkyl halides, elimination competes and alkenes are formed instead of ethers.
Therefore primary alkyl halides give the best yields; the statement favouring secondary or tertiary halides is wrong.
Hence, Secondary or tertiary alkyl halides gives better results of ether formation.
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