Abstract
The chelates Na 2[Ln(C 34H 28N 8O 8)Cl]· nH 2O of the malonyl dihydrazone of salicylaldehyde with the lanthanides have been prepared and characterized by elemental analysis, IR, UV, molar conductance and TGA. It is shown that the ligand coordinates to the central ion with one hydrazone unit in the keto form and one chloride ion participates in coordination to the metal ion. These chelates are 1:2 electrolytes in DMF and are more thermostable than their ligand due to the formation of chelate rings.
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