<p>Investigation of tautomerism and proton exchange involving protons bound to nitrogen and oxygen atoms is possible through evaluation of the proton-exchange rate and the factors affecting it. In this study, the dynamic NMR behavior of 2-(aryl)-4,5-diphenyl-1H-imidazole derivatives in solution was examined by analyzing concentration-dependent ¹H and ¹³C NMR spectra. The observed concentration-dependent spectral changes provide qualitative information on NH proton exchange and tautomerism in these systems. In addition, certain characteristic spectral features associated with the aryl substituent at the 2-position of the imidazole ring were identified, which can assist in the interpretation of overlapped proton and carbon signals. This dynamic NMR–based approach is presented as a qualitative and complementary tool for NMR data analysis, used alongside conventional two-dimensional NMR techniques such as TOCSY, and is not intended to replace these methods.</p> Graphical abstract <p></p>