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Question

Describe the laboratory method for preparation of diethyl ether and write the reaction with H2O and cold HI.

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Solution

Laboratory method for preparation of diethyl ether:
Williamson ether synthesis:
Sodium ethoxide is heated with ethyl bromide in presence of Mg.
CH3CH2ONa+CH3CH2BrMgΔCH3CH2OCH2CH3+NaBr
The reaction of diethyl ether with H2O .
CH3CH2OCH2CH3+H2OH+2CH3CH2OH
The reaction of diethyl ether with cold HI.
CH3CH2OCH2CH3+HI(cold)CH3CH2OH+CH3CH2I

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