@misc{HuenigWehner1989,
  author    = {H{\"u}nig, Siegfried and Wehner, Ingeborg},
  title     = {A convenient synthesis of 2,2',6,6'-Tetramethyl-4,4'-bipyridine and its oxidation to 2,2',6,6'-Tetracarboxy-4,4'-bipyridine},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-32005},
  year      = {1989},
  abstract  = {No abstract available},
  language  = {en}
}
@article{HuenigWehner1989,
  author    = {H{\"u}nig, Siegfried and Wehner, Ingeborg},
  title     = {Two Step Redox Systems LII: 2,2'-Bipyridylboronium Salts},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-44853},
  year      = {1989},
  abstract  = {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.},
  language  = {de}
}
@article{HuenigWehner1989,
  author    = {H{\"u}nig, Siegfried and Wehner, Ingeborg},
  title     = {Mehrstufige reversible Redoxsysteme, LIII: 4,4'-Bipyridin-1-1'-diylbisborane},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-44866},
  year      = {1989},
  abstract  = {No abstract available},
  language  = {de}
}