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71.
Light yellow crystalline products of the general formula Co(NH3)6(NpO2L)2A·xH2O, where A = Cl, NO3, or ClO4, are precipitated with Co(NH3)6
3
+ ions from weakly acidic chloride, nitrate, and perchlorate solutions of Np(V), containing up to 0.3 M CH2(COO)2
2
- (L2
-). When only malonate ions are present in the solution, Np(V) precipitates in the form of Co(NH3)6(NpO2L)2HL·H2O. These compounds are virtually insoluble in water and have similar X-ray patterns. Unlike oxalate and phthalate solutions, complex neptunyl(V) ion NpO2L2
3
- is not precipitated with Co(NH3)6
3
+ ions from malonate media of the above composition. 相似文献