Synthesis, structure and magnetic properties of three CuII2LnIII complexes (Ln = Pr, Nd and Sm) with an unsymmetrical Schiff base ligand
作者： Souvik Maity , Soumavo Ghosh , Prithwish Mahapatra , Ashutosh Ghosh
DOI: 10.1016/J.ICA.2018.07.023
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摘要: Abstract Three heterometallic trinuclear complexes of general formula, [{(CH3CN)CuL}2(µ-NO3)2Ln(NO3)] [Ln = Pr (1), Nd (2) and Sm (3)] have been synthesized by reacting a neutral metalloligand [CuL], derived from N2O2 donor unsymmetrically di-condensed di-Schiff base, H2L (where H2L = N-α-methylsalicylidene-N΄-salicylidene-1,3-propanediamine) with the respective lanthanide nitrates in 2:1 ratios. X-ray single-crystal structure reveals that these isomorphic (1–3) possess C2-symmetric units where two terminal metalloligands are coordinated to central Ln(III) ion transoid manner. In all three complexes, distorted tetradecahedron coordination geometry is formed around four μ2-phenoxido oxygen atoms (CuL) chelating nitrato coligands. The Cu(II) ions octahedral geometry. dc magnetic susceptibilities field dependent magnetization measurements reveal occurrence antiferromagnetic interactions between ions.
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