Complex peroxyuranates. Synthesis and structural assessment of alkali-metal and ammonium dioxoperoxy(sulfato)aquouranates(VI), A/sub 2/(UO/sub 2/(O/sub 2/)SO/sub 4/(H/sub 2/O)) (A = NH/sub 4/, Na), and alkali-metal and ammonium dioxoperoxy(oxalato)uranate(VI) hydrates, A/sub 2/(UO/sub 2/(O/sub 2/)C/sub 2/O/sub 4/). H/sub 2/O
Journal Article
·
· Inorg. Chem.; (United States)
Yellow microcrystalline alkali-metal and ammonium dioxoperoxy(sulfato)aquouranates(VI), A/sub 2/(UO/sub 2/(O/sub 2/)SO/sub 4/(H/sub 2/O)) (A = NH/sub 4/, Na), and alkali-metal and ammonium dioxoperoxy(oxalato)uranate(VI) hydrates, A/sub 2/(UO/sub 2/(O/sub 2/)C/sub 2/O/sub 4/).H/sub 2/O (A = NH/sub 4/, Na, K), have been synthesized from the reaction of the product obtained by treating an aqueous solution of UO/sub 2/(NO/sub 3/)/sub 2/.6H/sub 2/O with alkali-metal or ammonium hydroxide, AOH, with 30% H/sub 2/O/sub 2/ and aqueous sulfuric acid and oxalic acid solution, respectively, in the mole ratio UO/sub 2/(NO/sub 3/)/sub 2/.6H/sub 2/O:H/sub 2/O/sub 2/:SO/sub 4//sup 2 -/ or C/sub 2/O/sub 4//sup 2 -/ of 1:111:5 or 1, at pH 6 maintained by the addition of the corresponding alkali-metal or ammonium hydroxide. Precipitation was completed by the addition of ethanol. IR and laser Raman spectra suggest that the O/sub 2//sup 2 -/ and SO/sub 4//sup 2 -/ ions in (UO/sub 2/(O/sub 2/)SO/sub 4/(H/sub 2/O))/sup 2 -/ are bonded to the UO/sub 2//sup 2 +/ center in a bridging and in a monodentate manner, respectively, while both the O/sub 2//sup 2 -/ and C/sub 2/O/sub 4//sup 2 -/ ions in (UO/sub 2/(O/sub 2/)C/sub 2/O/sub 4/)/sup 2 -/ bind the uranyl center in bidentate chelated fashion. The complex peroxyuranates are diamagnetic and insoluble. The A/sub 2/(UO/sub 2/(O/sub 2/)SO/sub 4/(H/sub 2/O)) compounds, unlike A/sub 2/(UO/sub 2/(O/sub 2/)C/sub 2/O/sub 4/).H/sub 2/O, are stable up to 110 /sup 0/C. Whereas H/sub 2/O in A/sub 2/(UO/sub 2/(O/sub 2/SO/sub 4/(H/sub 2/O)) is coordinated to the UO/sub 2//sup 2 +/ center, it occurs as a water of crystallization in the corresponding peroxy oxalato compounds. 20 references, 3 tables.
- Research Organization:
- North-Eastern Hill Univ., Shillong, India
- OSTI ID:
- 5469226
- Journal Information:
- Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 25:14; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
AMMONIUM COMPOUNDS
CARBOXYLIC ACID SALTS
CHEMICAL PREPARATION
DATA
EXPERIMENTAL DATA
INFORMATION
MOLECULAR STRUCTURE
NUMERICAL DATA
OXALATES
OXYGEN COMPOUNDS
PEROXIDES
SODIUM COMPOUNDS
SULFATES
SULFUR COMPOUNDS
SYNTHESIS
URANATES
URANIUM COMPOUNDS
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
AMMONIUM COMPOUNDS
CARBOXYLIC ACID SALTS
CHEMICAL PREPARATION
DATA
EXPERIMENTAL DATA
INFORMATION
MOLECULAR STRUCTURE
NUMERICAL DATA
OXALATES
OXYGEN COMPOUNDS
PEROXIDES
SODIUM COMPOUNDS
SULFATES
SULFUR COMPOUNDS
SYNTHESIS
URANATES
URANIUM COMPOUNDS