Die Struktur des Selentetrafluorid in Lösung

The Structure of Selenium Tetrafluoride in Solution The fluorine exchange in selenium tetrafluoride is suppressed at ?140°C in solution of methylfluoride. SeF₄ is a monomer species under these conditions.     

Die Komplexbildung der neutralen Amidgruppe mit Cu2+ in wässeriger Lösung

The interaction between Cu²⁺ and the terdentate ligands N-picolinoyl-ethylenediamine, glycine-2-pyridylmethylamide, N^α-(2-pyridylmethyl)-glycinamide and N^α-(2-pyridylmethyl)-glycine-ethylamide, respectively, has been studied by spectrophotometry and potentiometry. At high pH values the ionised amide group undergoes complex formation and the resulting chelates have similar structures and stabilities. In slightly acidic solution however, each ligand gives rise to a different species. These facts are explained by assuming that the neutral amide group coordinates through its carbonyl oxygen atom. The stability constant and the absorption spectrum of each complex have been calculated by computer programmes.