Abstract
We report here synthesis, crystal and molecular structures as well as magnetic measurement results for new heterotrinuclear Schiff base complexes having a general formula [Ni2Ln(L)2(CH3COO)2(MeOH)2]NO3·4H2O (where Ln=LaIII (1) and NdIII (2) and L=C19H18N2O4Br2=N,N′-bis(5-bromo-3-methoxysalicylidene)-1,3-diaminopropanato) and the mononuclear [NiL(H2O)2] (3) complex. The NiII/4f compounds are isostructural and crystallize in the monoclinic space group P21/n. The lanthanide(III) ion lies on the center of symmetry and is ten-coordinated forming pentagonal antiprism. Compound 3 crystallizes in orthorhombic space group Pnma with the molecule lying on the mirror plane. The complex 1 indicated a weak antiferromagnetic interaction between the terminal NiII ions. The magnetic properties of 2 revealed that the NiII–NdIII interaction is antiferromagnetic. The magnetic data for 3 show dominant zero-field splitting effect of NiII ions.
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