Tetranuclear copper(II) complex of 2-hydroxy-N,N′-bis[1-(2-hydroxyphenyl)ethylidene]propane-1,3-diamine

Abstract

The title molecular structure, namely, (μ3-acetato)(μ2-acetato)bis(μ3-1,3-bis{[1-(2-oxidophenyl)ethylidene]amino}propan-2-olato)tetracopper(II) monohydrate, [Cu4(C19H19N2O3)2(CH3CO2)2]·H2O, corresponds to a non-symmetric tetranuclear copper complex. The complex exhibits one ligand molecule that connects two copper CuII metal centres via its ethanolato oxygen anion acting in a μ2-mode and one ligand molecule that connects three copper CuII metal centres via its ethanolato oxygen anion acting in a μ3-mode. One bridging acetate group acting in an η1:η1-μ2-mode connects two copper(II) ions while another bridging acetate group connects three copper(II) ions in an η1:-η2-μ3-mode. A chair-like Cu3O3 structure is generated in which the two CuO4N units are connected by one μ2-O ethanolate oxygen atom. These two units are connected respectively to the CuO3N unit via one μ3-O ethanolate oxygen atom and one μ2-O atom from an acetate group. The μ3-O atom also connects one of the CuO4N units and the CuO3N unit to another CuO3N unit, which is out of the chair-like structure. Each of the two pentacoordinated CuII cations has a distorted NO4 square-pyramidal environment. The geometry of each of the two CuNO3 units is best described as a slightly square-planar environment. A series of intramolecular O—H...O hydrogen bonds is observed. In the crystal, the units are connected by intermolecular C—H...O and O—H...O hydrogen bonds, thus forming sheets parallel to the ac plane

Bis(μ2-2,2′-((2-(hydroxy)propane-1,3-diyl)bis((nitrilo)eth-1-yl-1-ylidene))diphenolato)-dicobalt(III)

“…It contains three oxygen atoms (two phenolic groups and one alcohol group) and two nitrogen atoms (azomethine groups) which can participate in the coordination of metal ions. The literature confirms that there is information about the mono-(vanadium), di-(iron and cobalt), tera-(copper, nickel, and cobalt), and hexanuclear (copper and nickel) metal complexes of the mentioned Schiff base [1][2][3][4][5][6][7][8][9].…”

Synthesis and crystal structures of two related Co and Mn complexes: a celebration of collaboration between the universities of Dakar and Southampton

“…This activity enabled considerable knowledge transfer to LCCO and subsequently, more than 70 further sample analyses have been successfully completed. Many novel and interesting structures have been characterized and have resulted in eleven joint publications in a range of journals, between 2018 and 2023 (Gaye et al, 2018(Gaye et al, , 2020Gaye, Fall et al, 2023;Gaye, Sarr et al, 2023;Gaye, Ndoye et al, 2021;Gaye, Kebe et al, 2021;Sokhna et al, 2023); Diallo et al, 2022;Diop et al, 2019;Faye et al, 2020;Sarr et al, 2018;Sylla-Gueye et al, 2020). Recent samples originated from more than a dozen current doctoral students from within the LCCO itself, the wider Department of Chemistry or from two additional joint projects with the University of Bambey, Senegal and Gaston Berger University of Saint-Louis, Senegal.…”