Metal complexes of the Schiff base ligand L=1,2-bis (2′-pyridylmethyleneimino)benzene with Ni2+, Fe2+ and Cu2+ and their reactions with bridged bidentate ligands. The crystal structure of the complex [NiL(H2O)2]Cl2

Ni(II), Cu(II), and Zn(II) complexes of tetradentate schiff base containing two thiadiazoles units: Structural, spectroscopic, magnetic properties, and molecular modeling studies

“…Schiff base complexes containing different central metals such as Co, Ni, Cu, and Zn play a central role as chelating ligands in main group and transition metal coordination chemistry [1][2][3][4]. Transition metal complexes of tetradentate Schiff base ligands have been used as model analogues of certain metal enzymes [5][6][7], in catalysis and material chemistry [8][9][10][11], in various other fields such as illness treatment, biochemical reaction, and biological regulator [12], and have specific activities in pharmacology and physiology.…”

“…Here we focus on the preparation, characterization, and molecular modeling calculations of a tetradentate Schiff base ligand, 1,2-bis[2-[(5-methoxy- [1,3,4]thiadiazol-2-ylimino)-methyl]-phenol]-benzene (H 2 L) containing two thiadiazoles units (Scheme 1), and its mononuclear Cu(II), Ni(II), and Zn(II) complexes. The characterization of the ligands and complexes by elemental analyses, mass, NMR, UV-vis, ESR, IR spectra, and magnetic susceptibilities was also investigated in detail.…”

Synthesis and Spectral Characterization of Some Transition Metal Complexes Containing Pentadentate SNNNS Donor Heterocyclic Schiff Base Ligands

“…The coordination chemistry of Schiff bases as multidentate ligands having delocalized p-orbitals gained importance because of their use as models of biological systems, in catalysis and materials chemistry [2].…”

A new benzodiazepine molecule and its interactions with diorganotin(IV)chlorides

“…A number of different synthetic methods have been established to prepare a plethora of Schiff base ligands, involving condensation reactions between ketones or aldehydes and amines. In previous work from our laboratory N,N,N,N tetradentate Schiff base ligands, derived from the reactions of 1,2-diaminobenzene [10,11] or ethylenediamine [12,13] with 2-acetylpyridine or 2-pyridinecarboxyaldehyde under mild conditions, as well as their transition metal or lanthanide [14][15][16][17] complexes, were synthesized and characterized. However, the reaction of 1,2-diaminobenzene with 2-acetylpyridine, under prolonged heating, led to an unexpected cyclocondensation, forming the compound 2-(2 0 -pyridyl)quinoxaline [18].…”