New uranyl(VI) complexes with ons ligand derived from aromatic acid hydrazides and phenyl isothiocyanate. part III |
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| Authors: | Abd El -Hammid M Shallaby Kamal M Ibrahim Ashraf A El-Bindary Mohsen M Mostafa |
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| Institution: | (1) Chemistry Department, Faculty of Science, Mansoura University, Egypt |
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| Abstract: | Summary The synthesis and characterization of some dioxouranium(VI) complexes containing potential ONS donor ligands derived from benzoyl,o-chloro-,o-methyl-,P-chloro-,p-nitro-,p-methoxy-,p-aminobenzoylhydrazines and isonicotinylhydrazine with phenyl isothiocyanate are reported. Two types of complexes with general formulae UO2(HL)2(X)2] and UO2(HL)2] have been identified and characterized. All the uranyl complexes are of the UO2(HL)2(X)2] type (HL=bidentate monoanionic ligand, X=H2O and/or EtOH) and X bridges the uranyl ion and the thioketo groupvia hydrogen bonding. Upon heating to 140 °C, the complexes lose X giving a new complex of formula UO2(HL)2] (HL=tridentate monoanionic ligand) in which the thioketo-group participates in bonding. The latter complexes take up X again on exposure to water and/or ethanol vapour. |
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