Isomeriefälle bei CrIII- und CoIII-1:2-Komplexen aus 8-(2′-Carboxyphenyl)-amino-chinolinen: Zur Frage der pyramidalen Struktur des koordinierten, dreibindigen Stickstoffatoms von Metallchelaten
✍ Scribed by E. Steiner; Guido Schetty
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- German
- Weight
- 396 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
8‐(2′‐Carboxyphenyl)‐aminoquinolines are tridentate ligands. They form on complexation with Co^III^ or Cr^III^ singly negatively charged 1:2 complexes by loss of two protons. In these octahedral complexes the ligands are very probably coordinated equatorially. Nevertheless up to 3 isomeric 1:2 complexes are formed. According to the NMR.‐spectra two of them an symmetrical the third is asymmetrical. The basis of our assumption is that a trivalent N‐atom which is co‐ordinated to a metal ion and which is a link of two annelated rings can possess pyramidal valence structure. The ligand in the complex would thus be bent, which renders the possibility to form three conformers.