Abstract: The article highlights the study of the synthesis of a complex combination of p-nitrobenzoic acid with Cu2+from aromatic carbonic acid derivatives. Influencing factors on the synthesis of complex compounds in the room were studied. Specifically, the time dependence of the reaction, the effect of temperature, the concentration dependence wasobserved in practice. The synthesized complex was evaluated by means of IR-Fourier spectrometry, elemental analysis, mass spectrometry, TG-DSK and X-ray structural analysis to determine its chemical structure, as well as to justify that the new complex is thermally and chemically steady.