Metallindikatoren V. Die Eisenkomplexe der 2,3‐Dioxy‐naphtalin‐6‐sulfonsäure

Abstract

Abstract The acidity constants of the phenolic hydroxylgroups of 2,3‐dioxynaphtalene‐6‐sulfonic acid have been determined. The anion R −3 if this substance forms three ferric complexes FeR, FeR 2 −3 and FeR −6 3 , the stability constants of which are given.