TY - JOUR A1 - Hünig, Siegfried A1 - Wehner, Ingeborg T1 - Mehrstufige reversible Redoxsysteme, LIII: 4,4'-Bipyridin-1-1'-diylbisborane N2 - No abstract available KW - Bipyridinediylbisboranes / Redox systems / Cyclovoltammetry Y1 - 1989 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-44866 ER - TY - JOUR A1 - Hünig, Siegfried A1 - Wehner, Ingeborg T1 - Two Step Redox Systems LII: 2,2'-Bipyridylboronium Salts N2 - Dications 1 derived from 2,2-bipyridine are found to exist as fully reversible two step redox systems with persistent radical ions (SEM) of high thermodynamic stability, if the bridge X forces the two pyridine rings into co planar positions. The well known derivative 1a (Diquat R) is now complemented by the boronium ions 1c and 1e -1g., as shown by voltammetry and the uv spectra of the corresponding radicals. Y1 - 1989 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-44853 ER - TY - JOUR A1 - Hünig, Siegfried A1 - Wehner, Ingeborg T1 - A convenient synthesis of 2,2',6,6'-Tetramethyl-4,4'-bipyridine and its oxidation to 2,2',6,6'-Tetracarboxy-4,4'-bipyridine N2 - No abstract available Y1 - 1989 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-32005 ER -