Metallkomplexe mit Polyaminen VI: mit Hydrazin

Abstract

Abstract No precipitation occurs if hydrazine is added to solutions of the fluoroborates of Ni and Zn. The amount of hydrazine taken up by the metal cation in such solutions has been determined with the aid of pH measurements and it has been found, that Ni +2 adds 6 molecules of N 2 H 4 in equal steps and Zn +2 four molecules, hydrazine functionning therefore as a monodentate group. The formation constants of all of the individual complexes have been evaluated. The solubility products of {Ni(N 2 H 4 ) 2 Cl 2 }, {Ni(N 2 H 4 ) 3 Cl 2 } and {Ni(N 2 H 4 ) 3 SO 4 } have been determined.