Notes. First synthesis and structural assessment of alkali-metal carbonatodioxoperoxouranate(VI) monohydrates, A2[UO2(O2)(CO3)]·H2O, and carbonato-oxodiperoxovanadate(V) trihydrates, A3[VO(O2)2(CO3)]·3H2O
- 1 January 1986
- journal article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 3,p. 709-711
- https://doi.org/10.1039/dt9860000709
Abstract
The complexes A2[UO2(O2)(CO3)]·H2O (A = Na or K) have been synthesised from the reaction of the product obtained by treating UO2(NO3)2·6H2O with AOH and AHCO3(ratio U : CO3 2–= 1:4) with an excess of 30% H2O2 at pH 7–8, and A3[VO(O2)2(CO3)]·3H2O (A = Na or K) have been synthesised by treating V2O5 with A2CO3(ratio V: CO3 2–= 1 :1.5) and an excess of 30% H2O2 at pH ca. 7. They were precipitated with ethanol. The occurrence of trans OUO and terminal VO in the [UO2(O2)(CO3)]2– and [VO(O2)2(CO3)]3– ions, respectively, and the presence of triangular bidentate O2 2– and chelated bidentate CO3 2– groups, have been ascertained from i.r. and laser Raman spectra. The complexes A2[UO2(O2)(CO3)]·H2O can be dehydrated at Ca. 100 °C, a temperature at which A3[VO(O2)2(CO3)]·3H2O starts to decompose.Keywords
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