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 (LH 2 ) (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) 2 M(X) 2 (BA) 2 ] (3-6) (L= Dioxime, M = Fe(II) or Co(II), X= Cl 2 or H 2 O 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 (FeCl 2 .4H 2 O or CoCl 2 ) 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.