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|Title:||Synthesis and reactivity of some octacoordinated dioxouranium(VI) complexes of diacetyl bis(benzoylhydrazone) and benzil bis(benzoylhydrazone)|
|Abstract:||Octacoordinated dioxouranium(VI) complexes of the tetradentate ONNO donors diacetyl bis(benzoylhydrazone) (H2L) and benzil bis(benzoylhydrazone) (H2L') are reported. At low pH (1.5-2.5) complexes of the formula [UO2(H2L/H2L')X2](X- = Cl- , Br-, NO, NCS-, ClO, OAc- or 0.5SO) containing the ke-to form of the ligands are isolated. At higher pH(6-7), the complexes [UO2(L/L/H2L2)] are obtained in which the ligand is present in its deprotonated enolate form (L2-- or L'2-). Reactions of [[UO2(H2L/H2L')X2]/ [UO2(L/L')H2O2] with neutral monodentate (B) and bidentate lewis bases (AA) lead to the formation of mixed-ligand complexes of the type [UO2(L/L')(B2)] and [UO2(L/L')(AA)] respectively. Results of elemental analyses, magnetic susceptibility and conductivity measurements, spectroscopic (IR, electronic etc.) and thermal decomposition studies have been utilised to characterise the complexes.|
|Appears in Collections:||IJC-A Vol.28A(11) [November 1989]|
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