Abstract
In the framework of the PPP [Pariser-Parr-Pople] method, the existence of a new class of clathrates, “aromatic in aromatic,” has been shown to be possible for nitrogen-containing, aromatic macroheterocycles. Calculated values also agree well with the available experimental data for the energies of the lowest singlet-singlet and singlet-triplet transitions, the chemical shifts of protons and 13C nuclei, the electric polarizability, and the diamagnetic susceptibility. An aromaticity scale is given for the systems studied.
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Translated from Khimiya Geterotsiklicheskikh Khimii, No. 8, pp. 1126–1132, August, 1989.
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Vysotskii, Y.B., Balabanov, E.Y., Mestechkin, M.M. et al. Electronic structure and physical chemical properties of cyclohexapyridine, hexaazakekulene, and their clathrates with cyclopropenyl cation. Chem Heterocycl Compd 25, 944–949 (1989). https://doi.org/10.1007/BF00479618
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DOI: https://doi.org/10.1007/BF00479618