Which will be MOST stable resonationg structure?(A) \(CH_2=CH-\overse

1.	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) \(CH_2=CH-\overset\ominus CH-CH=\overset\oplus O-CH_3\)
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. Correct Answer - D

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

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.

Correct Answer - D

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