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 3

IR spectra at the range 400–4000 cm−1 for the (HL) ligand and its metal complexes. (a) HL. (b) Fe(II)L. (c) Cu(II)L. (d) Co(II)L.