Thermal Behaviour of Some Polyhydrocarboxylic Coordination Compounds with Neodium

New Nd-Co based polynuclear coordination compounds containing as ligand polyhydrocarboxylic acid as tartaric, malic and gluconic acids were prepared, namely: NdCo(tart)₃]·4H₂O, (NH₄)NdCo_0.5Cu_0.5(tart)₃]·4H₂O, (NH₄)NdCo(malic)₃]·4H₂O, (NH₄)NdCo_0.5Cu_0.5(malic)₃]·4H₂O, NdCo(gluc)₄]·4H₂O and Nd₂CoCu(gluc)₇]·5H₂O. A comparison between the thermal behaviour of the studied polynuclear coordination compounds concerning thermal stability and thermal decomposition stoichiometry was inferred. Oxalic and malonic intermediates were identified at about 300°C in the thermal decomposition of tartaric and malic compounds. In all the decomposition processes at about 400°C the presence of oxocarbonate is shown. The residual products are mixed oxides of perovskite type. This revised version was published online in August 2006 with corrections to the Cover Date.