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8.4. Organic chemistry reaction mechanism — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry8.4. Organic chemistry reaction mechanism1 Mark
MCQ
$\mathop {C{H_2}}\limits_{(I)}  = O \leftrightarrow \mathop {{}^ \oplus C{H_2}}\limits_{(II)}  - {O^\circleddash } \leftrightarrow \mathop {{}^\circleddash C{H_2}}\limits_{(III)}  - {O^ \oplus }$

Which of these structures is practically not a valid canonical structure for formaldehyde ?

  • A
    $I$
  • B
    $II$
  • ✓
    $III$
  • D
    None of these
✓

Answer

Correct option: C.
$III$
c
$\overset{\ominus }{\mathop{C}}\,{{H}_{2}}-\overset{\oplus }{\mathop{\underset{\centerdot \,\centerdot }{\mathop{\text{ }O}}\,}}\,:$ is highly unstable. (due to incomplete octet of oxygen) .

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