Suggest a route to prepare ethyl hydrogen sulphate (CH_(3)-CH_(2)-OSO_(2)-OH) starting from ethanol (C_(2)H_(5)OH).

Suggest a route to prepare ethyl hydrogen sulphate (CH_(3)-CH_(2)-OSO_

1.	Suggest a route to prepare ethyl hydrogen sulphate (CH_(3)-CH_(2)-OSO_(2)-OH) starting from ethanol (C_(2)H_(5)OH).
Answer» Solution :Preparation of ethyl HYDROGEN sulphate `[CH_(3)CH_(2)-OSO_(2)-OH]` starting from ethanol. STEP -1 : Protonation of alcohol and FORMATION of carbocation. `CH_(3)-CH_(3)-O-H^(+) rarr CH_(3)-CH_(2)-""^(+)OH_(2)` `CH_(3)-Cl-H_(2)SO_(4) rarr H^(+) + ""^(-)OSO_(2)OH` Step - 2: Attack of NUCLEOPHILE `HO-SO_(2)-O^(-) + ""^(+)CH_(2) - CH_(3) rarr CH_(3)-CH_(3)-CH_(2)-O-SO_(2)-OH`