Acid dissociation and nickel-complex formation constants of some nitrosonaphtholsulphonate ligands

The acid dissociation constants of several 1-nitroso- and 2-nitrosonaphtholsulphonate ligands, and the formation constants of their Ni2+, mono-complexes are reported. The measurements were performed in the temperature range 20.0–30.0°C and ionic strength 0.1 mol dm−3.