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In which of the following reactions, t -butyl benzene is formed 1. Benzene +t -butyl chloride AlCl ₃ 2. Benzene + ( CH ₃ )₂ C = CH ₂ BF ₃ HF 3. Benzene +t -butyl alcohol H ₂ SO ₄ 4. Benzene + butanoyl chloride Zn / HCl AlCl ₃

Options

  1. A1, 2 and 3
  2. B2, 3 and 4
  3. C1, 2 and 4
  4. D1, 3 and 4

Correct answer

A. 1, 2 and 3

Step-by-step solution

The given reactions take place as follows. 1. The replacement of H-atom in benzene, by alkyl group can be brought about alkyl chloride in presence of anhydrous AlCl ₃ . Reaction is known as Friedel-Craft's alkylation reaction. 2. In this reaction, benzene reacts to 2 -methyl propane, produce t -butyl benzene. 3. This can also be carried out by using alkanol and H ₂ SO ₄ . 4. The reaction I, II and III gives t -butyl benzene, while IV gives phenyl propanone.

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