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in Chemistry by (87.5k points)
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Which will be MOST stable resonationg structure?

(A) \(CH_2=CH-\overset\oplus CH-\overset\ominus CH-O-CH_3\)

(B) \(\overset\ominus CH_2-\overset\oplus CH-CH=CH-OCH_3\)

(C) \(\overset\ominus CH_2-CH=CH-CH=\overset\oplus O-CH_3\)

(D) \(CH_2=CH-\overset\ominus CH-CH=\overset\oplus O-CH_3\)

2 Answers

+1 vote
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Best answer

The structure having opposite charges on adjacent atoms are stable. structure having maximum number of covalent bonds is most stable.

-OCH3 exerts -I and +M effect. +M effect of -OCH3 predominant over -I effect of -OCH3 

and Also structure having complete octet are more state. In structure (iv) has complete octet and adjacent opposite charge. but in structure (i) has incomplete octet and -OCH3 group distablized adjacent anion.

Therefore, structure (D) will be more stable resonating structure.

+1 vote
by (88.8k points)
Correct Answer - D
by (15 points)
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