Guest

what are exceptions FRIEDAL CRAFT'S ALKYLATION?

what are exceptions FRIEDAL CRAFT'S ALKYLATION?

Grade:12

1 Answers

SAGAR SINGH - IIT DELHI
879 Points
11 years ago

Dear mridul,

Friedel-Crafts alkylation of methylbenzene (toluene)

Where the incoming alkyl group ends up depends to a large extent on the temperature of the reaction.

At 0°C, substituting methyl groups into methylbenzene, you get a mixture of the 2-.3- and 4- isomers in the proportion 54% / 17% / 29%. That's a higher proportion of the 3- isomer than you might expect.

At 25°C, the proportions change to 3% / 69% / 28%. In other words the proportion of the 3- isomer has increased even more.

We are all IITians and here to help you in your IIT JEE preparation.

All the best.

 If you like this answer please approve it....

win exciting gifts by answering the questions on Discussion Forum

 

Sagar Singh

B.Tech IIT Delhi

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free