A New Tetradentate Mixed Aza-Thioether Macrocycle and Its Complexation Behavior towards Fe(II), Ni(II) and Cu(II) Ions

Abstract

A new tetradentate mixed aza-thioether macrocyclic ligand 2,6-dithia[7](2,9)-1,10-phenanthrolinophane ([13]ane(phenN2)S2) was successfully synthesized. Reacting metal precursors [Fe(CH3CN)2(OTf)2], Ni(ClO4)2·6H2O, and Cu(ClO4)2·6H2O with one equivalent of [13]ane(phenN2)S2 afforded [Fe([13]ane(phenN2)S2)(OTf)2] (1), [Ni([13]ane(phenN2)S2)](ClO4)2 (2(ClO4)2), and [Cu([13]ane(phenN2)S2)(OH2)](ClO4)2 (3(ClO4)2), respectively. The structures of [13]ane(phenN2)S2 and all of its metal complexes were investigated by X-ray crystallography. The [13]ane(phenN2)S2 was found to behave as a tetradentate ligand via its donor atoms N and S.

Novel Schiff Bases Ligands and Their Complexes: Thermal Analysis, Antibacterial Activity, and Molecular Docking

“…Tetradentate β-ketoenamine Schiff base ligands that have been produced via the condensation of β-diketone with diamine or monoamine contain N2O2 donor atoms [2][3][4][5][6][7][8][9][10][11]. Moreover, polydentate and macrocycle Schiff base ligands that have various donor atoms; such asN2S2, N2O2, N4,and N2O [12][13][14] ;are known to cooperatewell with a variety of metal ions [15][16][17][18]. A wealth of articles that extend from pure synthesis to contemporary physically-and biochemically-relevant investigations indicate that the metal complexes of β-ketoenamine ligands have played an essential role incoordination chemistry-based studies [19][20][21][22][23][24][25].…”