Again MY beautiful Ester!!!

[Ocean5]

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Guys!!

I'm gald that I posted this, bc I have taken notes from some where (unfortunately I'm not sure about my source, but it should be one of these famous books) that ESTER and AMIDES are ACTIVATING
CABOXYLIC ACID, KETONE, ALDEHYDE are DEACTIVATING.

I just memorized it just as foggy it was, then I thought I should post this , b/c seems fishy, and now seeing different answers I'm confused more than ever.
CAn some one come up with a valid source and write down what is going on?

ANd especially the thing that one of you said about the Oxygen being the first element or not, well I 've never heard of that. SO please clarify it more. What do you mean that if ester's o2 is bonded it is activation otherwise deactivationg? can you give an example? thank you

OH Ester Ester Ester... I ove you Ester.. Please let me learn YOU!!!

 

[Clubby]

Kiddo, I think you are confusing a alkoxy group with an ester.

Alkoxy groups are -OCh3, -OCh2ch3. Yes, they are activating.

Ester groups are -COOCh3, COOch2ch3. These are deactivating.

Think charges. Think concepts.

 

[biocmp]

and remember, if it is connected directly to an Oxygen, such as a hydroxyl, single oxygen, or alkoxy gorup, it is electron donating. And then remember the exceptions, a tertiary amine, methyl, and (halogens* they are withdrawing, but ortho/para directors)

If you can remember this, then everything else falls in the meta director


This is the easy way to remember strictly for substituent directing...

 

[Ocean5]

Thank you.

 

[BodybldgDoc]

what does gald and deactivationg mean? When you're asking for help the least you could do is spell check your post.