This article clarifies the synthesis of a complex combination of pnitrobenzoic acid with Ni2+ from aromatic carbonic acid derivatives. Moreover, factors influencing the synthesis of the complex compound under room conditions were identified. In particular, the time dependence of the reaction, the effect of temperature, the concentration dependence were studied in practice. The synthesized complex was studied using IR-Fourier spectrometry, elemental analysis, mass spectrometry, TGDSK and X-ray structural analysis, its chemical structure was determined, and this new complex was proved to be thermally and chemically stable.