✦ LIBER ✦
Farbe und Konstitution der Isoalloxazin-Silber-Komplexe. Zum Verhalten des Riboflavins gegen Metallionen II
✍ Scribed by P. Bamberg; P. Hemmerich
- Publisher
- John Wiley and Sons
- Year
- 1961
- Tongue
- German
- Weight
- 573 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
The strong bathochromic shift of the flavin spectra occurring by interaction with Ag^+^ can also be obtained with Cu^+^ and Hg^2+^, but not with other metalions. Two kinds of metal‐isoalloxazin‐interaction must be discerned, a loose one with the free ligand and a very strong one with the ligand anion. 1:1‐Complexes are preferably built up, which are shown to be trigonal chelates of oxinate type and whose color is due to electron transfer from Ag^+^ to flavoquinone giving rise to a Ag^2+^‐flavosemiquinone mesomeric state responsible for the specific chelating qualities.