nitration of anisole

[tammie123]

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can someone please explain the shape of this graph to me, I understand why the dip between the two peaks is like that, ortho and para products are more stable due to the possibility of drawing more resonance structures than meta products. But why is are the peaks for meta products alot higher than ortho and para?

My lecturer also said o,p- directing groups win over meta directing groups, is this always the case, or does it depend on the molecule and substituents

 

[aglo123]

Like you said, o and p products are more stable because of res. structures.

Let's think about that, if o and p products are more stable than m products, then they therefore have less energy, which would lead to lower peaks than m.

M is less stable, so it is higher in energy, and has higher peaks. Hope this helps.

 

[owlegrad]

We are lenient with these sort of questions in the PCAT forum, but please no homework help type questions in the pre-pharmacy forum. Thanks.