Orgo Electrophile Nuc.. help

[trocha86]

---

Members do not see this ad.

Hi SDNers!!

A silly question and I just cant put my finger on it...

Im watchin chads videos on electron withdrawing and donating groups and when he explains about electron withdrawing groups and how they deactivate EAS and on the other hand electron donating groups and how they activate EAS Im with him and understand this
BUT...

He then goes ahead and says Nucleophiles are better with donating groups is this because they will make them more - there for more attractive?
and then he says Electrophiles are better with withdrawing groups and thats where im like 😱 super lost!!!😕

can some one please explain this to me PWEASE!!!!😳

 

[Xo1991]

Nucleophile is something like -OCH3, where the oxygen is directly attached to the benzene. The oxygen has lone pairs which activates the benzene ring by donating electrons, even though oxygen is electronegative, the fact is has lone pairs exceeds the inductive effect


An electrophile is, for example formaldehyde attached to the benzene ring. In this case the oxygen is withdrawing electrons away from the ring, thus deactivating it during EAS. Basically when the atom attached to benzene has no lone pairs, then that substituent is deactivating. Benzoic acid, etc, are all electron withdrawing and are meta-directors

 

[trocha86]

Thank you soo much!!! 🙂

 

[patricklin27]

Nucleophile is something like -OCH3, where the oxygen is directly attached to the benzene. The oxygen has lone pairs which activates the benzene ring by donating electrons, even though oxygen is electronegative, the fact is has lone pairs exceeds the inductive effect


An electrophile is, for example formaldehyde attached to the benzene ring. In this case the oxygen is withdrawing electrons away from the ring, thus deactivating it during EAS. Basically when the atom attached to benzene has no lone pairs, then that substituent is deactivating. Benzoic acid, etc, are all electron withdrawing and are meta-directors

all atoms without lone pairs are deactivating BESIDES methyl group