EWG/EDG speed or slow down a reaction?

[JawJock89]

Ive noticed a type of O Chem question that is recurring throughout my study materials and I just wanted to confirm what I think I've learned.

Electron Withdrawing Groups(Meta Directors) slow a reaction down compared to Benzene and Electron Donating Groups(Ortho/Para Directors) speed up a reaction compared to Benzene?

Is this always true?

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[DAT Destroyer]

This is a very good question. ALL meta directing groups will slow a reaction down, thus we call them deactivators. Most o/p directors will activate a molecule relative to benzene,,,,,,but not all. Groups like halogens and the NO group,,,,,called Nitroso, will direct ortho- para, but will slightly deactivate the molecule. This will result in a slower reaction. For the DAT,this is very important to know !!!

Hope this helps

Dr. Jim Romano

 

[JawJock89]

Ok so all meta directors, halogens, and NItroso groups slow down the Reaction. Got it. Thank you so much!


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[DAT Destroyer]

Keep up the good wor

Ok so all meta directors, halogens, and NItroso groups slow down the Reaction. Got it. Thank you so much!


Sent from my iPhone using SDN mobile

Keep up the good work!