Question

The order of activity of the various o and p-director is :

• A. \( -O^->-OH>-OCOCH_3>-COCH_3 \)
• B. \( -OH>-O^->-OCOCH_3>-COCH_3 \)
• C. \( -OH>-O^->-COCH_3>-OCOCH_3 \)
• D. \( -O^->-COCH_3>-OCOCH_3>-OH \)

Hint:

Stronger +R effect $\Rightarrow$ stronger activating o,p-director.

Answer 1

The Correct Option is A

Concept: Electron donating ability determines activating power.

Step 1: Strength of donating groups.
\[ -O^->-OH>-OR>-OCOR>-COR \]

Step 2: Reason.

• \(O^-\) strongest donor
• \(OH\) strong donor
• \(OCOCH_3\) weaker due to resonance withdrawal
• \(COCH_3\) deactivating