nonbenzen
Nonbenzen refers to a class of aromatic compounds that lack a benzene ring as their primary structural feature, distinguishing them from traditional aromatic hydrocarbons. While benzene and its derivatives (e.g., toluene, xylenes) are characterized by a six-carbon ring with alternating double bonds, nonbenzenes exhibit aromaticity through other cyclic structures, such as five-membered rings or larger polycyclic systems.
Aromaticity in nonbenzenes arises from the presence of delocalized π-electrons following Hückel’s rule (4n + 2 π-electrons,
Nonbenzenes play critical roles in organic chemistry, pharmacology, and materials science. For instance, heterocycles like pyrrole
Synthesis of nonbenzenes often employs methods tailored to their specific structures, such as cyclization reactions for