22 Replies
@Dexter
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.It can be both EWG and EDG but in general, for EAS rxns, it's gonna act like a EWG. Look at the conditions tho
so meta director?
how can it be EDG
wont it be EWG
If there is a better EWG on the ortho/para position, allyl group becomes donating.
ohh
makes sense
Because, in essence, it's a resonating system. If there isn't anything to pull away its electrons, it's going to pull towards itself, but if something else pulls at it, it'll give away its electrons density.
basically when better EWG it sucks electron harder and wrt to the ring the allyl becomes erich
and it donates?
Yup, that's what I've learnt
Wait isn’t ethene op director ?
according to my knowledge, this should do +M, and should be an ortho-para directing group.
har jagah alag kyu aa rha 😭
Imo it is ewg although i would like to see the que
I am sorry for the confusion from my side.
This group contains sp² electronegative carbon which would have a -I effect. By checking resonance of this group with benzene ring. The conclusion is: generation of +ve charge due to resonance with this group on ortho and para positions. This would make this group a meta directing group.
this is the best I could do, from my side.
My doubt is a part of this ques , the ones I ticked are for sure meta directing (and this gives the right ans too) but not sure whether ch=ch2 is meta directing
According to ans, as you say, -CH=CH2 should be an ortho para directing group. Since other m-directing groups are correctly marked.
Taking electronegativity into acc ig we can conclude that ch=ch2 has more meta directing tendency , however it may vary if other grps are present
that goes for every weak EWG
this makes the most sense ig
+solved @Opt
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