Suggest a route to prepare ethyl hydrogensulphate (CH3–CH2–OSO2—OH) starting from ethanol (C2H5OH)

Q39 of 51 Page 165

Suggest a route to prepare ethyl hydrogensulphate (CH₃–CH₂–OSO₂—OH) starting from ethanol (C₂H₅OH)

Ethanol when treated with sulphuric acid at around 140°C gives hydrogen sulphate. The reaction takes place as follows.

The ring systems having following characteristics are aromatic.

(i) Planar ring containing conjugated π bonds.

(ii) Complete delocalisation of the π−electrons in ring system i.e. each atom in the ring has unhybridised p-orbital, and

(iii) Presence of (4n+2)−electrons in the ring where n is an integer (n = 0, 1, 2,...........) [Huckel rule].

Using this information classify the following compounds as aromatic/nonaromatic.

Which of the following compounds are aromatic according to Huckel’s rule?

Match the reagent from Column I which on reaction with CH₃ —CH=CH₂ gives some product given in Column II as per the codes given below :

Match the hydrocarbons in Column I with the boiling points given in Column II.