G. Vicentini

N,N,N′,N′-tetramethylurea (TMU) adducts of the lanthanide perrhenates

The reaction between hydrated lanthanide perrhenates and N,N,N′,N′-tetramethylurea (TMU) was studied. Compounds of compositions Ln (ReO4)3·5TMU (Ln = LaSm) and Ln(ReO4)3·6TMU(LN = EuLu, Y) were obtained. The i.r. spectra and the molar conductances in nitromethane were determined.

N,N-dimethylacetamide adducts of the lanthanide nitrates

Abstract Compounds of general formula Ln(NO3)3·4DMA (Ln  Ce, Pr and DMA  N,N-dimethylacetamide) and Ln(NO3)3·3DMA (Ln  Y, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) have been obtained by the reaction of hydrated lanthanide nitrates with N,N-dimethylacetamide. The spectra between 340–800 mμ, the molar conductivities of some of the compounds, the i.r. spectra and X-ray powder patterns have been determined.

Diphenylphosphinamide adducts of the lanthanide perchlorates

Abstract The reaction between hydrated lanthanide perchlorates and diphenylphosphinamide (DPPA) was studied. Compounds of general formula Ln(ClO 4 ) 3 · 6DPPA (Ln = La-Lu, Y) were obtained. The i.r. spectra, the molar conductances in nitrobenzene and nitromethane, and the X-ray powder patterns of the substances were obtained.

Addition compounds between lanthanide bromides and N,N-dimethylacetamide

Abstract The reaction between hydrated lanthanide bromides and N,N-dimethylacetamide (DMA) was studied. Compounds of general formula LnBr 3 ·5DMA (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, and Dy) and LnBr 3 ·5DMA·3H 2 O (Ln = Ho, Er, Tm, Yb, Lu, and Y) were obtained. The i.r. spectra, the molar conductance of the compounds in DMA and nitromethane have been determined. A study considering the existence of cationic species in DMA solutions is also presented.

Adducts between some lanthanide nitrates and perchlorates and N,N,N′,N′-tetramethylmalonamide(TMMA)

Abstract Addition compounds of N,N,N′,N′-tetramethylmalonamide (TMMA) and some lanthanide nitrates and perchlorates were obtained. Compounds of general formula Ln(NO 3 ) 3 ·2TMMA and Ln(ClO 4 ) 3 ·4TMMA (Ln  La, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y) are described. The compounds were characterized by elemental analysis, i.r. spectra and X-ray powder patterns. The molar conductances in nitromethane were also determined.

Anhydrous N,N-dimethylacetamide adducts of some lanthanide perrhenates

Abstract The preparation of N,N-dimethylacetamide (DMA) adducts of some lanthanide perrhenates is described. Compounds of general formula Ln(ReO 4 ) 3 ·4 DMA (Ln - Ce, Pr, ND, Sm, Eu, Dy, Ho, Ere, Y) were obtained. A study considering the visible and i.r. spectra, conductance measurements, and thermogravimetric analysis are presented.

Diphenylphosphinamide adducts of the lanthanide chlorides and nitrates

Abstract The reaction between hydrated lanthanide chlorides and nitrates with diphenylphosphinamide (DPPA) was studied. Compounds of formula LnCl 3 . 5 DPPA (Ln  La, Ce, Pr, Nd), LnCl 3 .4 DPPA (Ln  Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y), Ln(NO 3 ) 3 . 3 DPPA (Ln  La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho) and Ln(NO 3 ) 3 .4 DPPA (Ln  Er, Tm, Yb, Lu, Y) were obtained. The compounds were characterized by elemental analysis and i.r. spectra. Conductance measurements in nitrobenzene and nitromethane were performed for the nitrates.

N,N-dimethylacetamide adducts of the lanthanide chlorides

Abstract Compounds of general formula LnCl 3 ·3·5 DMA (LnCe, Pr, Nd, Sm, Eu, Gd, Tb, Dy and DMA N,N-dimethylacetamide) and LnCl 3 ·3 DMA (LnY, Ho, Er, Tm, Yb, Lu) have been obtained by the reaction between hydrated lanthanide chlorides and N,N-dimethylacetamide. The spectra between 340 and 900 mμ, the i.r. spectra and the molar conductivities (including the compound LaCl 3 ·4 DMA described in a recent article) of the compounds have been determined.

N,N,N′,N′-tetramethylmamalonamide (TMMA) adducts of lanthanide chlorides and isothiocyanates

Abstract Lanthanide chloride and isothiocyanate adducts of tetramethylmalonamide of compositions LnCl 3 . 2TMMA (Ln = LaLu, Y, except Pm and Tm), Ln(NCS) 3 . 3TMMA (Ln = LaYb, Y, except Pm) and Lu(NCS) 3 . 2TMMA were obtained. The compounds were characterized by elemental analysis, i.r. spectra, conductance measurements and X-ray patterns.

Cyclic sulphoxides as ligands—IV: Adducts between lanthanide perchlorates and tioxane-oxide (TSO)

Abstract Adducts between lanthanide perchlorates and thioxane-oxide were prepared, corresponding to the compositions: Ln (ClO 4 ) 3 . 9TSO ( Ln = LaNd), Sm(ClO 4 ) 3 . 8·5TSO, Ln (ClO 4 ) 3 . 8TSO ( Ln = EuEr) and Ln (ClO 4 ) 3 . 7TSO ( Ln = TmLu, Y). The i.r. spectra, molar conductances in nitromethane and X-ray powder patterns were determined.