Heteropolynuclear Schiff-base complexes Cu–Ln–Fe (Ln = Sm & Pr) with magnetic property

• Two heteropolynuclear Schiff-base complexes were synthesized.
• Both complexes form similar 1D ladder-like structure.
• Magnetic properties of obtained complexes were determined.

Two new complexes [{CuL}Sm(H2O)3{Fe(CN)6}]2·6H2O (1) [{CuL}2Pr(H2O){Fe(CN)6}]2·4H2O (2) (H2L = N,N′-ethylenebis(3-methoxysalicylideneimine)) have been prepared by reactions of acyclic compartmental Schiff-base heterodinuclear 3d–4f compound [{CuL}Ln(NO3)3] (Ln = Sm & Pr) with K3[Fe(CN)6]. Crystal structures of both 1 and 2 reveal unique topology structures. 1 shows a dimeric heterotrinuclear [{CuL}Sm(H2O)3{Fe(CN)6}]2 while 2 displays a dimeric heterotetranuclear [{CuL}2Pr(H2O){Fe(CN)6}] with distorted sandwich moieties [{CuL}2Pr]. Both 1 and 2 form similar 1D ladder-like structure through the intermolecular double bridges of Cu–N bonds. The measurement of variable-temperature magnetic susceptibility reveals that both complexes 1 and 2 exhibit antiferromagnetic interaction between spin carriers.

Two heteropolynuclear Schiff-base complexes have been prepared by reactions of acyclic compartmental Schiff-base heterodinuclear 3d-4f compound [{CuL}Ln(NO3)3] with K3[Fe(CN)6]. Both complexes exhibit antiferromagnetic interaction between spin carriers.Figure optionsDownload as PowerPoint slide