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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.
CH3−CH2−ONa+CH3−CH2−BrMg−−→ΔCH3−CH2−O−CH2−CH3+NaBr
The reaction of diethyl ether with H2O .
CH3−CH2−O−CH2−CH3+H2OH+−−→2CH3−CH2−OH
The reaction of diethyl ether with cold HI.
CH3−CH2−O−CH2−CH3+HI(cold)→CH3−CH2−OH+CH3−CH2−I
Williamson ether synthesis:
Sodium ethoxide is heated with ethyl bromide in presence of Mg.
CH3−CH2−ONa+CH3−CH2−BrMg−−→ΔCH3−CH2−O−CH2−CH3+NaBr
The reaction of diethyl ether with H2O .
CH3−CH2−O−CH2−CH3+H2OH+−−→2CH3−CH2−OH
The reaction of diethyl ether with cold HI.
CH3−CH2−O−CH2−CH3+HI(cold)→CH3−CH2−OH+CH3−CH2−I
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