Decoding Chemical Resonance in π-Conjugated Systems

Understanding chemical resonance in poly- and macrocyclic π-conjugated systems requires access to the full topology of ground-state electron delocalization — not merely its observable molecular response. While magnetically-induced ring currents emerge from a narrow subset of frontier orbitals, as dictated by the Fowler–Steiner selection rules, the magnetically silent electrons that define the deeper resonance structure remain hidden from view. Here, we present a wavefunction-based framework that maps the spatial distribution and coherence of π-electron density across bonding domains, revealing patterns of delocalization that transcend the current-based indicators. Applied to a range of π-systems widely discussed in the context of global (anti)aromaticity, this approach exposes the internal logic of chemical resonance — distinguishing topological coherence from superficial circulation. Our findings suggest a shift in perspective: aromaticity arises not from current, but from coherence — the quiet entanglement of electrons bound by phase, not motion.