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

Journal of the Brazilian Chemical Society

Claudia C. Gatto²  Ernesto S. Lang²  Robert A. Burrow²  Ulrich Abram¹ 

[1] ,Universidade Federal de Santa Maria Departamento de Química Santa Maria RS ,Brazil

关键词: uranium;    hydrazones;    actinides;    structure analysis;   

DOI  :  10.1590/S0103-50532006000800019

来源: SciELO

【 摘 要 】

We describe the synthesis and characterization of 2-acetylpyridine-(2-aminobenzoylhydrazone) (HL¹) and its first dioxouranium complex. The single crystal X-ray structural analysis of the hydrazone, HL¹, reveals an almost planar structure with intermolecular hydrogen bonds. The complex [UO2(L¹)(dmf)2](NO3) is formed by refluxing a suspension of HL¹ 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.

【 授权许可】

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