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Resonance Effect

Which of the ...

Question

Which of the following resonating structures of 1 -methoxy-1, 3-butadiene is least stable?

- C H_{2} - C H = C H - C H = + O - C H_{3}

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C H_{2} = C H_{2} - - C H_{2} - C H = + O - C H_{3}

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- C H_{2} - C + H - C H = C H - O - C H_{3}

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C H_{2} = C H - + C H - - C H - O - C H_{3}

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Solution

The correct option is B $- C H_{2} - C H = C H - C H = + O - C H_{3}$
$- C H_{2} - C H = C H - C H = + O - C H_{3} (L e s s S t a b l e)$ ,

because positive charge is reside on the electronegative element and charge separation is more.

Hence, $- C H_{2} - C H = C H - C H = + O - C H_{3}$ is least stable.

Hence, the correct option is $A$

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Similar questions

I . ⊖ C H_{2} - \oplus C H - C H = C H - O - C H_{3}

I I . ⊖ C H_{2} - C H = C H - \oplus C H - O - C H_{3}

I I I . C H_{2} = C H - ⊖ C H - \oplus C H - O - C H_{3}

I V . C H_{2} = C H - ⊖ C H - C H = \oplus O - C H_{3}

C H_{2} = C H - C H = C H - O - C H_{3}

C H_{2} = C H - . . N H - C H_{3}

C H_{2} = C H - . . O . . - C H_{3}

C H_{2} = C H - . . O . . - C H = C H_{2}

C H_{2} = C H - N H_{2}

C H_{3} - C H = C H - C H_{2} - O | | C - C H_{3} \to C H_{3} - C H = C H - C H_{2} - O | | C - O H

C H_{2} = C H - + C H_{2} and C H_{2} = C H - C H_{2} - + C H_{2}

C H_{3} - N H - + C H_{2} and + C H_{2} - O H

C H_{3} - O - C H_{2} - + C H_{2} and C H_{2} - O - + C H_{2}

C H_{3} - + C H - C H_{2} C H_{2} C H_{3} and C H_{3} C H_{2} - + C H - C H_{2} C H_{3}

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