Bhattacharjee, Chira R. ; Chaudhuri, Mihir K. ; Purkayastha, R. N. Dutta (1989) New heteroligand peroxothorates(IV) of the type A2[Th(O2)F2(OH)2].nH2O (A = NH4, n = 3; A = Na or K, n = 1) and molecular peroxothorium(IV) complexes of the type [Th2(O2)3L(H2O)4].5H2O (L = C2O4 or SO4) Inorganica Chimica Acta, 160 (2). pp. 141-152. ISSN 0020-1693
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00201...
Related URL: http://dx.doi.org/10.1016/S0020-1693(00)80578-2
Abstract
Synthesis of complex difluorodihydroxomonoperoxothorates(IV), A2[Th(O2)F2(OH)2].nH2O (A = NH4, n = 3; A = Na or K, n = 1) have been achieved from the reaction of hydrated thorium oxide, ThO2. nH2O, with 30% H2O2 and 48% hydrofluoric acid in the concentration ratio of Th:H2O2:HF as 1:77.6: 56.5 at a pH range 10-11 maintained by the addition of aqueous ammonia or alkali metal hydroxides. Novel dimeric molecular complexes diperoxotetra- aquo-μ-peroxo-μ-oxalatodithorium(IV) pentahydrate, [Th2(O2)3(C2O4)(H2O)4].5 H2O and diperoxotetra-aquo- μ-peroxo-μ-sulphatodithorium(IV) pentahydrate, [Th2(O2)3SO4(H2O)4].5H2O have been synthesised directly from the reaction of an aqueous solution of thorium nitrate, with ammonium oxalate or ammonium sulphate and 30% hydrogen peroxide in the respective cases, at pH 7-8 and at pH 2, respectively. Characterisation and structural assessment of the compounds have been made from the results of chemical analysis, pyrolysis studies, magnetic susceptibility measurements and ESR, IR and laser Raman spectroscopic studies. An internal comparison of the results so obtained with those of titanium and zirconium analogues has been made.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 23455 |
| Deposited On: | 25 Nov 2010 09:29 |
| Last Modified: | 30 May 2011 07:36 |
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