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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1997 (1997), S. 297-301 
    ISSN: 0947-3440
    Keywords: Pyrazine ; 2,2′-Bipyridine ; Helical structures ; Supramolecular chemistry ; Nitrogen heterocycles ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An improved preparation of 2,2′-bipyridine-6-carboxaldehyde 1 provides this compound in good yield for the further syntheses of oligo-(2,2′-bipyridyl)pyrazines 6-8, new ligands for supramolecular metallorganic complexes. According to 1H-NMR spectroscopic and X-ray crystallographic studies, the bis(2,2′-bipyridyl) compound 6 exists in a helical conformation in solution and in the solid state. The structure of the tetrakis(2,2′-bipyridyl) compound 8 is also confirmed through its crystal structure.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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