Neodymium dinitrato

Dimethylacetamide. The stability constants and enthalpy values for lanthanide-nitrate interactions in anhydrous DMA (R=La, Nd) have been determined by means of calorimetric titration (Airoldi et al. 1982). The experimental results support the existence of the iimer-sphere mono- and dinitrato complexes with the following formation constants A i = 17,. 2= 16 for lanthanum and K =25, K2 = 92 for neodymium (cf. table 7). The enthalpies of formation 1 (La 48.2, Nd l.OkJmol" ) and AH2 (La 23.1, Nd 8.3kJmor ) are all endothermic, although rather small. Finally, mononitrate complexes appear to be less stable for both La(III) and Nd(III) ions compared to the corresponding chloro- and bromo complexes (cf. tables 6, 7). 

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