The number of possible monoalkylated products formed in the Friedel- Crafts reaction of anisole with 2- chloro- 3- methylbutane in the presence of anhydrous AlCl3 at 50 C is _______Correct answer is '4'. Can you explain this answer?

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Answer

Possible Monoalkylated Products in Friedel-Crafts Reaction

The Friedel-Crafts reaction is a common organic reaction used to introduce alkyl or acyl groups into aromatic compounds. In this reaction, anhydrous aluminum chloride (AlCl3) is used as a catalyst to activate the electrophile (alkyl or acyl halide) and form a carbocation intermediate that can react with the aromatic ring.

Anisole is an aromatic ether that contains a methoxy group (-OCH3) attached to a benzene ring. When anisole is reacted with 2-chloro-3-methylbutane in the presence of anhydrous AlCl3 at 50°C, the possible monoalkylated products that can be formed are as follows:

1. p-Isomer: The alkyl group (3-methylbutyl) can substitute one of the hydrogen atoms on the benzene ring in the para position relative to the methoxy group. This product is called the para-isomer.

2. o-Isomer: The alkyl group (3-methylbutyl) can substitute one of the hydrogen atoms on the benzene ring in the ortho position relative to the methoxy group. This product is called the ortho-isomer.

3. m-Isomer: The alkyl group (3-methylbutyl) can substitute one of the hydrogen atoms on the benzene ring in the meta position relative to the methoxy group. This product is called the meta-isomer.

4. Alkylated anisole: The alkyl group (3-methylbutyl) can substitute the methoxy group (-OCH3) on the benzene ring. This product is called the alkylated anisole.

Thus, there are four possible monoalkylated products that can be formed in the Friedel-Crafts reaction of anisole with 2-chloro-3-methylbutane in the presence of anhydrous AlCl3 at 50°C.

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