Question

Which of the following is a non-aromatic compound?

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

Criteria for simple aromatics are:

1. The molecule must follow Huckel's rule, having 4n + 2 electrons in the delocalized, conjugated p-orbital cloud;
2. The molecule must be planar;
3. The molecule must be cyclic;
4. Every atom in the ring must be able to participate in delocalizing the electrons by having a p-orbital or an unshared pair of electrons.

In the given compounds:
a. is non-aromatic (Rule 1 is not followed)
b. is aromatic
c. is antiaromatic
d. is aromatic