Nature of anion-templated π+–π+ interactions
Literature Information
Inacrist Geronimo, N. Jiten Singh, Kwang S. Kim
Interaction between positively charged aromatic groups (π+–π+) is characterized by anti-parallel, displaced-stacked structures in the presence of counteranions. Binding energies of pyridinium, N-methylpyridinium and N-methylimidazolium dimers are much larger than that of benzene–pyridine (π–π) and pyridinium–benzene (π+–π). Stabilization is attributed to attractive electrostatic interaction with significant dispersion contribution.
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