Research Article

Study of Synthesis, Characterization, DFT, and In Vitro Biological Activity of Cu(II), Co(II), and Fe(II) Metal Complexes Based on Heterocyclic Azo Pyrazole Dye Ligand

Figure 4

1H-NMR chemical shifts of compounds (ppm, 500 MHz, DMSO-d6 solutions, room temperature) for (a) HL ligand and (b) Cu(II)L.
(a)
(b)