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

Abstract

In the title heteronuclear NiII–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)nickel(II)), [NiSm(C20H22N2O4)(NO3)3], with the hexa­dentate Schiff base compartmental ligand N,N′-bis­(3-ethoxy­salicyl­idene)ethyl­enediamine (H2L) the Ni and Sm atoms are doubly bridged by two phenolate O atoms provided by the Schiff base ligand. The coordination of Ni is square planar with the donor centres of two imine N atoms and two phenolate O atoms. The samarium(III) centre has a deca­coordination environment of O atoms, involving the phenolate O atoms, two eth­oxy O atoms and two O atoms each from the three nitrates. Some weak C—H⋯O and O⋯Ni [3.381 (4) Å] inter­actions generate a two-dimensional zigzag sheet.