ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 25, Number 6
JKCSEZ 25(6)
December 20, 1981 

Two types of Ni(Ⅱ)-polyethyleneimine (PEI) complexes, [Ni(PEI)]Cl2 and [Ni(P-EI)Cl2] were synthesized and their catalytic activities in the decomposition reaction of hydrogen peroxide were investigated. For the purpose of comparison, the corresponding monomeric complexes, [Ni(en)3]Cl2 and [Ni(en)2Cl2] were also prepared; it was observed that their activities increase in the following order; 0 ≒ [Ni(en)3]Cl2 ≤ [Ni(en)2Cl2] < [Ni(PEI)]Cl2 < [Ni(PEI)Cl2] On the basis of structural analysis by means of visible and infrared spectroscopy, the catalytic activiy of these Ni(Ⅱ)-PEI complexes is assumed to depend on the bond strength between the ligand and the nickel ion.