Question

Which of the following compounds is not aromatic?

• A.
• B.
• C.
• D.

Answer 1

Answer: (C)

According to Huckel?s rule an aromatic compound has $(4n+2)\pi$ electrons,
where $n=0,1,2,3\dots$ etc.
$4n+2=2;n=0$; aromatic
$4n+2=6;n=1$; aromatic
$4n+2=4;n=0.5$; non-aromatic
$4n+2=6;n=1;$ aromatic