Are the methyl groups in xylene included in the aromatic part of the molecular structure?

Question

Quizplus · Accepted Answer

Aromatic bonding refers to the delocalization of pi electrons throughout a conjugated system of atoms with alternating double bonds. In the case of xylene, only the carbons in the ring are involved in this delocalization and hence, only these atoms are considered part of the aromatic part of the molecule. The methyl groups do not contribute to the pi electron delocalization and are thus not considered part of the aromatic part of the molecule.

Are the Methyl Groups in Xylene Included in the Aromatic