Ochem DAT destroyer question 21

[virajpatel]

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I don't get how B has an electron withdrawing group..

 

[virajpatel]

 

[hurley]

.

 

[virajpatel]

But I thought that benzene was an Electron Donating group

 

[virajpatel]

nevermind I get it. I wasnt paying attention to chad clearly when he taught the cardio method.

 

[Tooth Worthy]

So what is the right answer?

 

[game33]

The correct answer is A.

 

[Tooth Worthy]

Can you explain why? I am completely lost now w/ this concept. I have protonated all the answers and can't quite discern which is a weaker conjugate acid...

 

[DrRoyal Pains]

If you want to narrow it down quick and dirty....everything else is either resonance stabilized or has an electron withdrawing group. Choice A has neither. Because choice A is the stronger/most unstable base, it is the weakest acid.