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Carborane-Functionalized Polyaza Aromatic Ligands:  Synthesis, Crystal Structure, and a Copper(II) Complex

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posted on 05.06.2006, 00:00 by Anton M. Prokhorov, Dmitry N. Kozhevnikov, Vladimir L. Rusinov, Oleg N. Chupakhin, Ivan V. Glukhov, Mikhail Yu. Antipin, Olga N. Kazheva, Anatolii N. Chekhlov, Oleg A. Dyachenko
A consecutive aromatic nucleophilic substitutions of hydrogen in 1,2,4-triazine 4-oxides and an aza Diels−Alder reaction is a versatile route to carborane-functionalized bi- and terpyridines and their 1,2,4-triazine analogues. The heterocycles facilitate deboronation of the substituted carboranes, and the carborane moiety has a significant influence on the coordination properties of the ligands as well.