Abstract
Four novel binuclear Ln(III) complexes containing the dianion of phthalic acid (phth) as a bridging ligand have been synthesized, namely [Ln2(phth)(phen)4](CIO4)4.xH2O and [Ln2(phth)(NO2-phen)4](CIO4)4.xH2O (Ln = Dy, Nd; phth = dianion of phthalic acid; phen = 1,10-phenanthroline; NO2-phen = 5-nitro-1,10-phenanthroline). The complexes have been characterized by elemental analyses, IR, electronic spectra and conductances. The variable-temperature magnetic susceptibility (4-300K) of the complex [Dy2(phth)(NO5-phen)4](CIO4)4.6H2O has been determined, and the data were fit to the susceptibility equation derived from the spin Hamilton, Ĥ=δḼz 2+gβH·Ĵi+2Z′J′+MJ(Ĵz), by the least square method. The exchange interaction parameters are Z′J′ = -5. 94 × 10−4 cm−1 indicating that there is a weak antiferromagnetic spin exchange interaction between the lanthanide ions in the complex.
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