The Novel bis-dioxime-based and Boronic acid-capped Groups Containing Fe(II) and Co(II) Complexes: Synthesis, Characterization, and Spectroscopy

Abstract

In the present work, firstly the novel mono oxime (1) and asymmetric dioxime ligand (LH₂) (2) derived 4′-hydroxyvalerophenone as ketone were prepared under optimum conditions. Then, the bis-dioxime-based and boronic acid-capped groups containing Fe(II) and Co(II) complexes [(L)₂M(X)₂(BA)₂] (3-6) (L= Dioxime, M = Fe(II) or Co(II), X= Cl₂ or H₂O and BA = Butyl boronic acid (BBA) or Ferrocene boronic acid (FBA)) were synthesized in a two-necked round-bottom reaction flask by direct contact of dioxime ligand (2), and different boronic acid with metal salts (FeCl₂.4H₂O or CoCl₂) without special requirement of any additional chemical process. The prepared ligands and its Fe(II) and Co(II) complexes were characterized by means of NMR spectra, FT-IR spectra, UV-Vis spectra, LC-MS, melting point and magnetic susceptibility measurements as well as elemental analysis. The spectroscopic results demonstrated that the proposed Fe(II) and Co(II) complexes are a six-coordinated species and octahedral geometry. The infrared spectra (FT-IR) of the Fe(II) and Co(II) complexes indicated the characteristic peak at range 1208-1217 cm^-1 cm corresponding υ(B-O) stretching.

Keywords

• Bis-dioximates
• Fe(II) and Co(II) complexes
• spectroscopy
• boronic acid

References

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