The new mixed complex {[2Ni(L1)2.2Ni(L1)(L2)].2(NO3)4•2H2O} was obtained from a mixture, under aerobic conditions, of solution Ni(NO3)2,6H2O and the two diamine pyrazolic ligands L1, N1-((3,5-dimethyl-1H-pyrazol-1-yl)methyl)propane-1,2-diamine, L2, N2-((3,5-dimethyl-1H-pyrazol-1-yl)-methyl)propane-1,2-diamine. Obtained in very good yield, this identified characterized by FT-IR, EDX, ultraviolet...