Which one of the following statements is not true for a compound to be considered as aromatic? A. The compound must be cyclic and planar B. The compound must be monocyclic. C. The compound must have a conjugated system with p orbital at every vertex D. The compound must satisfy Hückel's rule - must have (4n + 2) t electrons. E. none of these

B

Explanation:

Aromatic compounds are benzene-like compounds. They usually have a characteristic odor and that's why they are termed aromatic. For a compound to be aromatic, there are some criteria that must be satisfied by the compound in question.

Let's examine the options to see if they fit.

Option A is correct, aromatic compounds must be cyclic and planar

Option C is correct. There must be conjugation of the pi electron system

Option D is correct, they must possess 4n + 2 pi electrons. This is referred to as the Huckel's rule

Option B is wrong. This is simply because we have compounds which are not monocyclic and are aromatic. Example of this is anthracene and naphthalene