Bipyridine, a workhorse among the ligands of complex chemistry, can be reduced with sodium to its dianion. Depending on the solvent different sodium salts crystallize: from dimethoxyethane/toluene a polymer, from tetramethylethylenediamine/benzene a lipophilically wrapped [Na O] cluster, and from pure pentamethyldiethylenetriamine a normal Na -bpy salt (see picture) are obtained.
Bipyridin, ein Arbeitspferd unter den Liganden der Komplexchemie, läßt sich mit Natrium zum Dianion reduzieren. Je nach Solvens kristallisieren verschiedenartige Natrium‐Salze: Aus Dimethoxyethan/Toluol wird ein Polymer, aus Tetramethylethylendiamin/Benzol ein lipophil umhüllter [Na14O]12 +‐Cluster und aus Pentamethyldiethylentriamin ein monomeres Na2‐bpy‐Salz erhalten (siehe Strukturbild).
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