Summary
The calculation of the algebraic structure count of a cyclobutadieno-annelated unbranched phenylene is reduced to an enumeration of the Kekulé structures of an unbranched catacondensed benzenoid system. For the latter computation, easy and well-known algorithms exist.
Zusammenfassung
Die Berechnung des algebraischen Strukturzählers eines unverzweigten cyclobutadieno-annelierten Phenylens wird auf die numerische Ermittlung der Kekulé-Strukturen eines unverzweigten cactakondensierten benzenoiden Systems zurückgeführt. Für letztere stehen einfache und bekannte Algorithmen zur Verfügung.
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Gutman, I., Kirby, E.C. Algebraic structure count of cyclobutadieno-annelated unbranched phenylenes. Monatsh Chem 125, 539–547 (1994). https://doi.org/10.1007/BF00811846
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DOI: https://doi.org/10.1007/BF00811846