Synthesis, crystal structure, electrochemical and magnetic properties of dinuclear complexes with strong electron-drawing groups in the diphenoxo-tetraaza macrocyclic ligand

Macrocyclic dinuclear nickel(II) and manganese(II) complexes: synthesis, X-ray crystal structures, DNA cleavage, and antimicrobial activity studies

“…The Mn1-Mn2 separation bridged by the two phenolic oxygen atoms is 3.249 (3) These results indicate that the ring substituent electronic effects associated with fluoro (1 and 2), methyl (1a) [18] and t-butyl (1b) [30] groups influence the first and second oneelectron reductions. It can be concluded that the metal centers are more electropositive when strong electron-withdrawing groups are attached to the ring of macrocyclic complexes, and therefore more easily reduced [17].…”

“…The [2 ? 2] condensation of 2,6-diformyl-4-fluorophenol with a variety of diamines in the presence of template 3d transition metal ions generates predominantly oxo-bridged dinuclear complexes [8,17]. In continuation of our ongoing studies on the structures and biological activities of Schiff base complexes, three new Schiff base complexes (one Ni 2?…”

Designing and Exploration of the Biological Potentials of Novel Centrosymmetric Heteroleptic Copper(II) Carboxylates

“…Pharmaceuticals 2023, 16,1462 2 of 21 so are sterically less saturated, a structural feature of the complex that could be exploited for the interactions of the metal center with biomolecular receptors in biological activity [1]. Apart from the possible interaction of metal center, the biological properties of these com-plexes could also be tuned up to varying extent by brining small structural changes in the attached carboxylate or N-donor ligands [2][3][4][5][6][7][8][9][10][11].…”