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9. Hydricarbon — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry9. Hydricarbon1 Mark
MCQ
Which of the following compounds are antiaromatic
  • A
    $(I)$ and $(V)$
  • B
    $(II)$ and $(V)$
  • C
    $(I)$ and $(IV)$
  • ✓
    $(V)$ and $(VI)$
✓

Answer

Correct option: D.
$(V)$ and $(VI)$
d
For a compound to be aromatic it must have $(4n + 2)\pi e^-$ and system should be planar where $n$ is an integer. $(V)$ and $(VI)$ both have $4\, e^-$ and planar structure. Hence are Antiaromatic

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