SciELO - Scientific Electronic Library Online

vol.17 issue8Thin film of copper hexacyanoferrate dispersed on the surface of a conducting carbon ceramic material, SiO2/ZrO2/C-graphite: characteristics and electrochemical studiesEPR and semi-empirical studies as tools to assign the geometric structures of FeIII isomer models for transferrins author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Journal of the Brazilian Chemical Society

On-line version ISSN 1678-4790


GATTO, Claudia C.; LANG, Ernesto S.; BURROW, Robert A.  and  ABRAM, Ulrich. Syntheses and structures of 2-acetylpyridine-(2-amino-benzoylhydrazone) and its dioxouranium(VI) complex. J. Braz. Chem. Soc. [online]. 2006, vol.17, n.8, pp.1612-1616. ISSN 1678-4790.

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.

Keywords : uranium; hydrazones; actinides; structure analysis.

        · abstract in Portuguese     · text in English     · English ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License