Ligand-directed assembly of trinuclear and one-dimensional heterotrimetallic CuIILnIIIFeIIIcomplexes: unusual antiferromagnetic CuIIFeIIIcoupling via cyano bridges

Rare phenoxo- and cyano-bridged CuLnFe trinuclear complexes were prepared. The 1D Cu₂DyFe complex displays both single-chain magnetic properties and the intrachain Cu(ii)–Fe(iii) antiferromagnetic coupling.

(Acetone-2κO){μ-6,6'-dimeth-oxy-2,2'-[propane-1,2-diylbis(nitrilo-methyl-idyne)]diphenolato-κ1:2O,O,O,O:O,N,N',O}tris-(nitrato-1κO,O')copper(II)samarium(III)

In the title heteronuclear complex, [CuSm(C₁₉H₂₀N₂O₄)(NO₃)₃(CH₃COCH₃)], the Cu^II ion is five-coordinated by two O and two N atoms from the 6,6′-dimeth­oxy-2,2′-[propane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolate ligand (L) and by an O atom from the acetone mol­ecule in a square-pyramidal geometry. The Sm^III ion is ten-coordinated by six O atoms from the three nitrate ligands and four O atoms from the L ligand. In L, the C atoms of the diamino­propane fragment are disordered over two positions in a 0.674 (10):0.326 (10) ratio.

(Acetone-2κO){μ-6,6'-dimeth-oxy-2,2'-[propane-1,2-diylbis(nitrilo-methyl-idyne)]diphenolato-κ1:2O,O,O,O:O,N,N',O}tris(nitrato-1κO,O')copper(II)terbium(III)

In the title heteronuclear complex, [CuTb(C₁₉H₂₀N₂O₄)(NO₃)₃(CH₃COCH₃)], the Cu^II ion is five-coordinated by two O and two N atoms from the 6,6′-dimeth­oxy-2,2′-[propane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolate ligand (L) and an O atom from the acetone mol­ecule in a square-pyramidal geometry. The Tb^III ion is ten-coordinated by six O atoms from three chelating nitrate ligands and four O atoms from the L ligand. In L, the CH₂–CH–CH₃ fragment is disordered over two conformations, with refined occupancies of 0.725 (11) and 0.275 (11).