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-IV-A- I and IIB- II and IVC- I and IVD- I and III

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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}

H - N = C = O I \leftrightarrow H - ⊖ N - C \equiv \oplus O I I \leftrightarrow H - \oplus N \equiv C - ⊖ O I I I

H - N = C = O I \leftrightarrow H - ⊖ N - C \equiv \oplus O I I \leftrightarrow H - \oplus N \equiv C - ⊖ O I I I

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

S_{N} 1

S_{N} 2

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