Which one of the following compounds is aromatic?
A) I
B) II
C) III
D) IV

Question

Which one of the following compounds is aromatic? 
A) I 
B) II 
C) III 
D) IV

Quizplus · Accepted Answer

A compound is considered aromatic if it meets the following criteria: 
1) It is a cyclic molecule with delocalized pi electrons 
2) It follows Hückel's rule, which states that the ring has 4n+2 pi electrons, where n is a non-negative integer. 
Out of the four compounds given, only compound III meets both criteria as it has a cyclic ring with 6 pi electrons (4n+2, where n=1). Therefore, the correct answer is C.

Which One of the Following Compounds Is Aromatic