IR spectra of synthesized ligands have a lot in common, due to their structure similarity. As a result of coordination all signals in the IR spectra are shifted besides bands of ester groups. ¹H NMR spectra of obtained ligands is bit similar, this is due to their structure. Signals of pyridine ring protons 3-(2-pyridyl)-N¹-methyl-1,2,4-trazole-5-acetic acid ethyl ester shifted to 0.11–0.13 ppm in a weak field in compare with izomers. N¹–CH3 signals are shifted to lower field than N²–CH3, it can be explained by the influence of negative magnetic anisotropy of pyridine ring. Methyl and methylene signals of ester group are located nearly in the same field in L^1–3.

Coordination of all ligands occurs through the nitrogen atom of pyridine ring and N4-triazole. In this case all L¹, L² and L³ signals of pyridine protons suffer shift to a low field. Methyl and methylene signals of ester group almost no shifted what indicate that no coordination through oxygen atom.