Stabilities of Bivalent Metal Chelates of 3-Hydroxy-3-phenyl-I-p-acetylphenyltriazene

Stabilities of palladium, copper, nickel, zinc, and manganese chelates of 3-hydroxy-3-phenyl-1-p-acetyl phenyltriazene have been determined in 70% vlv dioxane-water mixture by employing the Bjerrum-Calvin pH-titration technique. The titration medium has been maintained at a constant ionic strength (0.1 M, KCl) and at 25±0.5°. Log K: palladium 21.511, copper 21.160, nickel 15.937, zinc 14.239, and manganese 10.895