A new dinuclear CuII–SmIIIcomplex with a salen-type Schiff base ligand

Abstract

The title complex (systematic name: diaqua­{6,6′-dimeth­oxy-2,2′-[1,2-ethanediylbis(nitrilo­methyl­idyne)]­diphenolato}­di­nitrato­samarium(III)copper(II) nitrate), [CuSm(C18H18N2O4)(NO3)2(H2O)2]NO3, is composed of a discrete dinuclear cation with a salen-type Schiff base ligand and one uncoordinated nitrate anion. The copper and samarium are doubly bridged by two phenolate O atoms provided by the Schiff base ligand. There are some classical inter­molecular hydrogen bonds (O—H⋯O), and some weak O⋯Cu and N⋯Cu inter­actions are also observed. These inter­actions generate a two-dimensional infinite layer.