Steric Control of Directional Isomerism in Dicopper (I) Helicates of Asymmetrically Substituted 2, 2': 6', 2'': 2'', 6'''-Quaterpyridine Derivatives

EC Constable, F Heirtzler, M Neuburger…

文献索引：Constable; Heirtzler; Neuburger; Zehnder Journal of the American Chemical Society, 1997 , vol. 119, # 24 p. 5606 - 5617

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被引用次数: 89

摘要

Derivatives of 2, 2': 6', 2'': 2'', 6'''-quaterpyridine have been prepared which are asymmetrically substituted with alkyl groups in the 4-or 6-position and with various substituents in the 4'-position. These ligands form dicopper (I) double helicates which have been investigated by 1H and 13C NMR spectroscopic techniques. The formation of helical isomers is shown to depend on the intramolecular interactions between the constituent ...