No abstract

The acid dissociation constant of heptane-3.5-dione, together with the stability constants of its chelate complex with cobalt(i1). have been determined in aqueous dioxan (50% v/v) over the temperature range 5-45 "C. From these results, values of the enthalpy and entropy of protonation and chelation have been calculated. Stability constants of heptane-3.5-dione chelate complexes of copper( 11). nickel(l1). manganese(l1). and magnesium( 11) have been measured at 25 ' C .' Stability Constants of Metal-ion Complexes,' Cham. SOC.

Bestimmung der Dissoziationskonstante des Liganden sowie der Stabilitätskonstanten seiner Komplexe mit Kobalt(II), Kupfer(II), Nickel(II), Mangan(II) und MagnesiumUI).

Die Säuredissoziationskonstanten der Dione (I) in wäßriger Lösung und in wäßrigem Dioxan werden mitgeteilt.