In the first part of the study 3,3’,4,4’-tetraaminodiphenylmethane was obtained as a result of a rearrangement reaction of bis(2-nitroanilino) methane in concentrated hydrochloric acid medium. The conditions of the rearrangement reaction were examined, the methods reported in the literature about this subject were reviewed and finally a new method was developed with which it is possible to obtain a more purified product than those obtained by other methods. And it was seen that this method is easier than the others. The optimal reduction conditions 3,3’-dinitro-4,4’-diaminodiphenylmethane with HCl and metallic tin to 3,3’-4,4’-tetraamino-diphenylmethane were determined. The formation conditions of the complex which was formed from 3,3’-4,4’-tetraamino-diphenylmethane with copper were studied and stability constants determined potantiometrically using Calvin-Bjerrum and Irwing-Rossotti methods. The ligand protonation constants were determined as K₁=10.10¹⁰, K_{2=5.62.10⁸, K3=3.98.10⁶, K4=2.24.10⁵ and the stability constants of copper complex as K1=7.08.10⁹ and K2=3.16.10⁷. The free energy change in the formation of the complex is ΔG=-23.177 kcal/mol. According to the formation curve, the number of the stability constants and the elemental analysis the formula of the complex was determined as C13H16N4.CuCl2.} Keywords :