Synthesis and Characterization Complex Nickel(II) with Diphenylamine

Abstract

Ni(NO3)2.6H2O and diphenylamine formed a complex compound in 1:6 mole ratio of metal to ligand in methanol. The forming of the complex was indicated by shifting of maximum wavelength in UV-Vis spectra. Analysis of the nickel percentage in the complex by Atomic Absorption Spectroscopy (AAS) showed an empirical formula of the complex was Ni(diphenylamine)4(NO3)2.6H2O. The conductivity measurement of the complex showed the charge ratio of cation and anion = 1:1. It meant that NO3- was coordinated to the Ni2+ center ion and likewise as a counter ion. The formula of complex was approximated [Ni(diphenylamine)4(NO3)(H2O)](NO3).5H2O. Based on infrared spectra, it releaved diphenylamine as monodentate ligand which bind to nickel(II) through the secondary NH functional groups. Electronic spectra showed a transition peak at 25252 cm-1 and 13802 cm-1 which indicating octahedral geometry. The complex was paramagnetic with μeff= 2.99 BM.