Which of the following is not the pair of resonance structures- I- HN - C - O - H - O - C - NII- N- - C - O - N - C - O-III- CH3 - O-C - C-H2 - CH3 - O-C - CH2IV- CH3 - O-C - CH3 - CH3 - OH-C - CH2

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Resonance Effect

Which of the ...

Question

Which of the following is not the pair of resonance structures?
$I . H N = C = O \leftrightarrow H - O - C \equiv N$
$I I . ¯ N = C = O \leftrightarrow N \equiv C - O^{-}$
$I I I . C H_{3} - O | | C - ¯ C H_{2} \leftrightarrow C H_{3} -^{-} C = C H_{2}$
$I V . C H_{3} - O | | C - C H_{3} \leftrightarrow C H_{3} - O H | C = C H_{2}$

I and II

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I and IV

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I and III

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II and IV

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I . H N = C = O \leftrightarrow H - O - C \equiv N

I I . ¯ N = C = O \leftrightarrow N \equiv C - O^{-}

I I I . C H_{3} - O | | C - ¯ C H_{2} \leftrightarrow C H_{3} -^{-} C = C H_{2}

I V . C H_{3} - O | | C - C H_{3} \leftrightarrow C H_{3} - O H | C = C H_{2}

I . H N = C = O \leftrightarrow H - O - C \equiv N

I I . ¯ N = C = O \leftrightarrow N \equiv C - O^{-}

I I I . C H_{3} - O | | C - ¯ C H_{2} \leftrightarrow C H_{3} -^{-} C = C H_{2}

I V . C H_{3} - O | | C - C H_{3} \leftrightarrow C H_{3} - O H | C = C H_{2}

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

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I I

I I I

C H_{2} = O H | C - C H_{2} (I) - O | | C - C H_{3} ⇌ C H_{3} - O | | C - C H_{2} (I I) - O | | C - C H_{3}

⇌ C H_{3} - O H | C = C H (I I I) - O | | C - C H_{3}

H - O | | C - O H \leftrightarrow H - O^{-} | C = + O H \leftrightarrow H -^{-} O - H \leftrightarrow H -^{+} O - H

I

I I

I I I

I V

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