COORDINATION COMPOUNDS OF RARE-EARTH NITRATES WITH N,N-DIMETHYLACETAMIDE

Coordination compounds of rare-earth nitrates with N,N-dimethylacetamide (DMAA), [Sc(HO)(DMAA)(NO)(μ-OH)Sc(NO)(DMAA)(HO)](NO), [La(DMAA)(NO)], [Ce(DMAA)(NO)][Ce(DMAA)(NO)] and [Ln(DMAA)(NO)] (Ln = Pr, Nd, Sm-Lu, Y), have been synthesized. Using physicochemical analysis methods (elemental analysis, IR spectroscopy, XRD, XRD, TGA-DSC), the compositions and structural features were determined; thermal decomposition of the compounds was studied in a wide temperature range (50-900°C). Complexes [Ln(DMAA)(NO)] form two isostructural series: crystals with Ln = Pr-Dy belong to the monoclinic symmetry, and with Ln = Ho-Lu, Y - to the orthorhombic symmetry. It is shown that the coordination compounds can be used as precursors for the production of nanoscale REE oxides (from 12 to 50 nm) with a specific surface area of 18-65 m/g.