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1 )(dmf)2)(NO3) é formado a partir de uma suspensão em refluxo de HL 1 com nitrato de uranila em metanol, na presença de pequena quantidade de trietilamina. A recristalização em dmf resulta na obtenção de cristais adequados para a difração de raios X. A análise por difração de raios X do complexo mostra uma geometria de coordenação bipiramidal de base pentagonal para o urânio(VI), formada pelos oxigênios da uranila nas posições apicais, uma molécula da hidrazona monodesprotonada e dois átomos de oxigênio das moléculas de dimetilformamida nas posições equatoriais. We describe the synthesis and characterization of 2-acetylpyridine-(2-amino- benzoylhydrazone) (HL 1 ) and its first dioxouranium complex. The single crystal X-ray structural analysis of the hydrazone, HL 1 , reveals an almost planar structure with intermolecular hydrogen bonds. The complex (UO2(L 1 )(dmf)2)(NO3) is formed by refluxing a suspension of HL 1 with uranyl nitrate in methanol in the presence of a small quantity of triethylamine. Recrystallisation from dmf results in single crystals suitable for X-ray crystallography. The single crystal X-ray study of the complex shows a distorted pentagonal-bipyramidal coordination geometry around the uranium(VI) center, determined by two axial oxo ligands, two nitrogen and one oxygen atoms from a chelating monodeprotonated hydrazone and the oxygen donor atoms of two dimethylformamide molecules.

Syntheses and structures of 2-acetylpyridine-(2-amino-benzoylhydrazone) and its dioxouranium(VI) complex