difference between OCOR and COOR for aromatic substituents?

[slashnroses19]

in the kaplan book it has activating ortho/para example as OCOR

and for the deactivating they have COOR for meta

whats the difference between the two componds?

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[lilchinoboy03]

OCOR has the O connected to the benzene, and O has lone electron pairs to be electron donating, i.e. o/p directing. COOR or COR for that matter, is a ketone, aldehyde, or carboxy connected to the benzene. The oxygen(s) on the carbon is pulling electrons away from the benzene, thus electron withdrawing and m directing. Anybody feel free to correct me if I'm mistaken.👍

 

[Mila]

OCOR has the O connected to the benzene, and O has lone electron pairs to be electron donating, i.e. o/p directing. COOR or COR for that matter, is a ketone, aldehyde, or carboxy connected to the benzene. The oxygen(s) on the carbon is pulling electrons away from the benzene, thus electron withdrawing and m directing. Anybody feel free to correct me if I'm mistaken.👍

You're absolutely right. For all intents and purposes:

OCOR is OR which is activating

COOR is C=O which is deactivating

 

[dat_student]

in the kaplan book it has activating ortho/para example as OCOR

and for the deactivating they have COOR for meta

whats the difference between the two componds?

...................O
...................||
OCOR = - O - C - R

O is connected to the aromatic ring and can donate electrons.
------------------------------------

.............O
.............||
COOR = - C - O - R

C is connected to the aromatic ring and is partially positive. It is not a good donator of electrons.