Rashid R. Valiev and Victor N. Cherepanov The influence of benzene rings on aromatic pathways in the porphyrins International Journal of Quantum Chemistry 113
The influence of an external magnetic field on electrons of aromatic and anti-aromatic molecules is the reason for the appearance of diamagnetic and paramagnetic ring currents. The contribution of diamagnetic ring currents dominates in aromatic molecules, while that of paramagnetic ring currents dominates in anti-aromatic molecules. The paths of the currents within porphyrinoids macrocycles in their subrings are explored by using quantum chemical calculations.
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