Syntheses, crystal structures, thermal and magnetic properties of new heterotrinuclear CuII-LnIII-CuII complexes incorporating N2O4-donor Schiff base ligands

New heterotrinuclear complexes [Cu2La(H(2)hamP)(2)(NO3)(2)H2O]NO3 center dot 6MeOH (1), [Cu2Pr(H(2)hamp)(2)(NO3)(3)]center dot 6MeOH (2), [Cu2Nd(H(2)hamp)(2)(NO3)(MeOH)(2)](NO3)(2)center dot H2O (3) where H(2)hamp is the dideprotonated forms of the N,N'-bis(2,3-dihydroxybenzylidene)-1,3-diamino-2,2-dimethylpropane were obtained in the reaction of the Schiff base ligand with the respective salts of Cu-II and Ln(III). The compounds 1-3 crystallize in the monoclinic space group P2(1)/n. The X-ray structures of 1-3 show the central Ln(III) ion surrounded by two CuH(2)hamp units, so that Ln(III) and Cu-II ions are linked by phenoxido bridging groups. The compounds 1-3 are stable at room temperature and their decomposition processes proceed in the similar way. The temperature dependence of the magnetic susceptibility and the field-dependent magnetization indicated that the interaction between Cu-II and Ln(III) ions (Ln = Pr and Nd) is antiferromagnetic. (C) 2018 Elsevier Ltd. All rights reserved.