ATAR Notes: Forum

Uni Stuff => Universities - Victoria => University of Melbourne => Topic started by: Turtle on March 11, 2014, 12:55:13 pm

Title: Chemistry question on ortho/meta/para addition
Post by: Turtle on March 11, 2014, 12:55:13 pm

I am wondering why there is no reaction for these 2 reactions.
Aren't NO2 and CN both electron withdrawing groups, therefore meta-directing?
Can anybody explain why there is no reaction in both cases. Or have they given me the wrong answer?

(http://i.imgur.com/dLK6Wx9.png)

(http://i.imgur.com/MNEaosQ.png)

Title: Re: Chemistry question on ortho/meta/para addition
Post by: lzxnl on March 11, 2014, 04:11:40 pm

Nitrobenzene is an electron withdrawing group, yes. That means it can't undergo Friedel-Crafts alkylation. It basically won't react.

Electron withdrawing groups essentially stop that reaction dead.

Title: Re: Chemistry question on ortho/meta/para addition
Post by: pink0829 on March 11, 2014, 08:37:36 pm

Turtle, are these prepgenie questions? Are they good? I thought the answers came with explanations.

Title: Re: Chemistry question on ortho/meta/para addition
Post by: Turtle on March 12, 2014, 07:17:19 pm

Thanks for the help lzxnl!!

Hey Pink!! no they are not, they are McGraw Hill questions I think?
I just found them on google  :)