question_answer

Which compound is aromatic?

A)  

B)       

C)         

D)       

Correct Answer: D

Solution :

is aromatic because the compound is cyclic and number of electrons is 2 which is in accordance with the Huckels rule\[(4n+2)\pi \]. When\[n=0\], according to this rule, number of \[\pi \] electrons is\[4\times 0+2=2\].