why ester is electron donating group?

[atlanta213]

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isn't carbonyl deactivating meta group??

I am confusing.

According to kaplan, coor is deactivating meta director, ocor activating ortho/para

coor and ocor? isn't that same thing?

 

[PooyaH]

isn't carbonyl deactivating meta group??

I am confusing.

According to kaplan, coor is deactivating meta director, ocor activating ortho/para

coor and ocor? isn't that same thing?

COOR and OCOR are not the same thing! The reason OCOR is activating is cuz oxygen can donate its electron to the benzene ring!

 

[excusezmoi]

THey're not the same thing..
----O
----||
-O- C- R
vs

O
||
C-O-R
Check the Aromatic Compounds Chapter and memorize the substituent effects this is very important.

Also you can see a pattern here:

1) O/P = NH2, NR2, NHCOR
OH, OR, OCOR
R
X
2) M
NO2, SO3H, COOH, COOR, COR, CHO
(notice how O is after the N, S, C in Meta? hehe just my way of remember but also know the effects)

 

[atlanta213]

Thank you! I always miss the question because I understood only 90 percent. However you guys fill me another 10%.

I appreciate that.