Explore BrainMass
Share

Rate of Electrophilic Substitution

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

Why is halogenation the fastest one?

Why is friedel crafts reactions the slowest? And why is it so slow that it can not undergo meta substitution electrophilic reactions?

© BrainMass Inc. brainmass.com March 22, 2019, 2:37 am ad1c9bdddf
https://brainmass.com/chemistry/organic-chemistry/rate-electrophilic-substitution-582737

Attachments

Solution Preview

Why some aromatic additions happens fast and some happens slow
Hi, halogenation of benzene happens fast while alkylation happens slow. Why is it so? The question is described in the attachment please go there for the whole question. Thanks!

****************

There are two reasons for this:

(1) Oriention and Reactivity of Substituent Group

Halogenation of anisole is the fastest electrophilic substation reaction, whereas Friedel-Crafts reaction is the slowest one. This is because -OR group (e.g. -OCH3 here) is an activating substituent ...

Solution Summary

This solution offers to-the-point answer with sound reasoning and explanation, aided with proper citation to a relevant site.

$2.19