The Synthesis and Characterization of Substituted Aminomethylglyoximes and Aminophenylglyoximes and Their Complexes with Some Transition Metals

Abstract

In this study, six new unsymmetrical vic-dioximes, N-(3,4-dimethylphenyl)aminomethylglyoxime (L 1 H 2 ), N-(3-chloro-4-methylphenyl)aminomethyl-glyoxime (L 2 H 2 ), N-(2,6-dimethylphenyl)aminomethylglyoxime (L 3 H 2 ), N-(3,4-dimethylphenyl)aminophenylglyoxime (L 4 H 2 ), N-(3-chloro-4-methylphenyl)-aminophenylglyoxime (L 5 H 2 ) and N-(2,6dimethylphenyl)aminophenylglyoxime (L 6 H 2 ) have been synthesized from chloromethylglyoxime or chlorophenylglyoxime and the corresponding substituted aromatic amines. The Co(II), Ni(II) and Cu(II) complexes of these ligands were prepared. The structures of these new ligands and their complexes are proposed based upon IR, UV-Vis, 1 H NMR spectral data, magnetic measurements, and elemental analyses.

Synthesis, characterization and liquid–liquid extraction properties of new methoxyaminobiphenylglyoxime derivatives and their complexes with some transition metals

“…For the nickel complexes of ligands, the trans-form of these complexes are confirmed (Figure 2) by the 1 H NMRspectrum, since only one signal occured at 16.11, 16.82 and 17.04 p.p.m., respectively. This is in agreement with similar vic-dioximates complexes in the literature [46][47][48][49].…”

“…For this purpose, solvent extraction experiments were performed to estimate the effectiveness of ligands in transfering alkali metals (Li + , Na + , K + , Cs + ) and transition metals (Co 2+ , Ni 2+ , Cu 2+ , Zn 2+ , Cd 2+ ) and Pb 2+ from the aqueous into organic phase. The results obtained using dichloromethane solutions of ligands to extract metal picrates from aqueous solution according to Pedersen's procedure [46] are listed in Table 5. The equilibrium concentration of picrate in aqueous phase was then determined spectrophotometrically [32].…”

Quantum Chemical Computational Studies on a vic-Dioxime Ligand and Its Nickel Complex

“…In previous publication, the experimental UV-Vis spectrums of the ligand and its Ni(II) complex had been recorded in the dimethyl sulfoxide (DMSO) solvent [10]. In this study, the electronic absorption spectra of the compounds in the same solvation were calculated using the time-dependent DFT (TD-DFT) method with the B3LYP/6-31G(d) level by applying the polarizable continuum model (PCM).…”

“…In previous works, 1-(2,6-Dimethylphenylamino)propone-1,2dione dioxime ligand containing vic-dioxime group ( Figure 1) and its nickel (II) complex ( Figure 2) was synthesized and characterized by Fouier Transform Infrared (FT-IR), Nuclear Magnetic Resonance (NMR), Ultraviolet-Visible (UV-Vis.) spectral data and X-ray diffraction [10][11][12]. In this study, comprehensive quantum chemical calculations were performed on these compounds.…”

Synthesis and Characterization of Novel Aromatic Substituted γ- and δ-Ketoxime Esters

“…Being capable of coordinating to metal ions, oxime ligands have been interesting due to their variable geometries (25)(26)(27)(28) and fine tuning of their substitutients (29,30). Oxime ligands are known to serve as analytical reagents (31,32) and also employed as models for Vitamin B12 and dioxygen carrier systems (33), as well as catalysts in chemical processes (34)(35)(36)(37).…”