Smetana, Volodymyr published the artcileSynthesis of Anhydrous Acetates for the Components of Nuclear Fuel Recycling in Dialkylimidazolium Acetate Ionic Liquids, Recommanded Product: 3,5-Diamino-1,2,4-triazole, the main research area is dialkylimidazolium uranium lanthanide strontium oxo acetate complex preparation; crystal structure dialkylimidazolium uranium lanthanide strontium oxo acetate complex.
Anhydrous acetate salts with uranium {[C2C1i.m.][UO2(OAc)3] (1), [C2C2i.m.][UO2(OAc)3] (2), and [C4C1i.m.][UO2(OAc)3] (3)}, lanthanides {[C2C2i.m.]2[La(OAc)5] (4) and [C2C1i.m.]2[Nd(OAc)5] (5)}, and strontium {[C2C1i.m.]n[Sr(OAc)3]n (6)} (C2C1i.m. = 1-ethyl-3-methylimidazolium, C2C2i.m. = 1,3-diethylimidazolium, C4C1i.m. = 1-butyl-3-methylimidazolium, and OAc = acetate) were prepared and structurally characterized. Both lanthanides and strontium are common components of the nuclear fuel waste, and their separation from uranium is an important but still challenging task. A new synthetic approach with dialkylimidazolium acetate ionic liquids (ILs) as the solvent was developed for the direct synthesis of homoleptic acetates from the corresponding hydrates and, unexpectedly, hardly soluble f-element oxides. Although the group of characterized compounds shows perfect structural variability, all actinide and lanthanide metal ions form monomeric complex anions where the metal cation coordinates to five ligands including two oxygen atoms in the case of uranium, as is commonly observed for uranyl compounds Crystallog. analyses revealed that [UO2(OAc)3]- anions possess rather standard D3h symmetry featuring a hexagonal-bipyramidal coordination environment, while the lanthanide anions [Ln(OAc)5]2- are fully asym. and the Ln3+ cations are 10-coordinated as a distorted bicapped tetragonal antiprism. This is the 1st report of lanthanide ions coordinated in this fashion. For Sr2+, 9-fold coordination through oxygen atoms as a strongly distorted tricapped trigonal prism is observed The crystallization of anhydrous, homoleptic, anionic acetate complexes from such a large variety of different metal salts appears to be due to the properties of dialkylimidazolium acetate ILs themselves, including enhanced basicity from the high concentration of free anions and their greater affinity for hydrogen-bonding solutes relative to metal cations. The direct reaction of uranium, selected lanthanides, and strontium salt hydrates with dialkylimidazolium acetate ionic liquids gives anhydrous metal acetates under ambient conditions. This route allows also direct dissolution of the corresponding metal oxides and isolation of homoleptic metal complexes in the presence of various competing ligands. The crystal structure analyses reveal unique coordination of the lanthanides in analogy with the uranyl complexes and significantly distinct behavior of Sr2+.
Inorganic Chemistry published new progress about Crystal structure. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Recommanded Product: 3,5-Diamino-1,2,4-triazole.
Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem