{6,6′-Diethoxy-2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}trinitratosamarium(III)copper(II)

Abstract

A heteronuclear CuII–SmIII complex (systematic name: {6,6′-di­eth­oxy-2,2′-[ethane-1,2-diylbis(nitrilo­methyl­idyne)]­diphenol­ato-1κ4O1,O1′,O6,O6′:2κ4O1,N,N′,O1′}trinitrato-1κ6O,O′- samarium(III)copper(II)), [CuSm(C20H22N2O4)(NO3)3], with the hexa­dentate Schiff base compartmental ligand N,N′-bis­(3-ethoxy­salicyl­idene)ethyl­ene-1,2-diamine, has been synthesized and structurally characterized. The Cu and Sm atoms are doubly bridged by two phenolate O atoms provided by the Schiff base ligand. The coordination of the Cu atom is square planar, formed by two imine N and two phenolate O atoms. The SmIII atom has a decacoordination environment, formed by the phenolate O atoms, two ethoxy O atoms and two O atoms each from the three nitrates. No classical inter­molecular hydrogen bonds are found. Some weak C—H⋯O and O⋯Cu inter­actions [O⋯Cu = 3.167 (4) Å] generate a two-dimensional zigzag sheet.