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1.
Fedoseev A. M. Budantseva N. A. Andreev G. B. Yusov A. B. Shirokova I. B. 《Russian Journal of Coordination Chemistry》2002,28(4):279-284
The reactions of some rare-earth elements (La, Ce, Sm, Lu, Gd) and Am(III) with heteropolymolybdate anions are studied. The complexation rate constants of Am(III) in a solution with Al(OH)6Mo6O18
3- and Cr(OH)6MoO18
3-
6 (1 = 18 ± 6 and 25 ± 5, respectively) are determined by spectral methods. The Ln[Al(OH)6Mo6O18] · nH2O, Eu[Cr(OH)6Mo6O18] · nH2O, and Am[Al(OH)6Mo6O18] · nH2O isostructural compounds are synthesized. The crystal structure of the Sm[Al(OH)6Mo6O18] · 11H2O complex was determined by the X-ray diffraction analysis. The results of spectroscopic and thermogravimetric studies of the obtained compounds are presented. 相似文献
2.
Yusov A. B. Fedoseev A. M. Astafurova L. N. 《Russian Journal of Coordination Chemistry》2002,28(4):264-271
The interaction of Np(VI), Pu(VI), Np(V), Np(IV), Pu(IV), Nd(III), and Am(III) with Al(III) in solutions at pH 0–4 was studied by the spectrophotometric method. It was shown that, in the range of pH 3–4, the hydrolyzed forms of neptunyl and plutonyl react with the hydrolyzed forms of aluminium. In the case of Pu(VI), the mixed hydroxoaqua complexes (H2O)3PuO2(-OH)2Al(OH)(H2O)3
2+ or (H2O)4PuO2OAl(OH)(H2O)4
2+ are formed at the first stage of hydrolysis. Np(VI) also forms similar hydroxoaqua complexes with Al(III). The formation of the mixed hydroxoaqua complexes was also observed when Np(IV) or Pu(IV) was simultaneously hydrolyzed with Al(III) at pH 1.5–2.5. The Np(IV) complex with Al(III) has, most likely, the formula (H2O)
n
(OH)Np(-OH)2Al(OH)(H2O)3
3+. At pH from 2 to 4.1 (when aluminium hydroxide precipitates), the Np(V) or Nd(III) ions exist in solutions with or without Al(III) in similar forms. When pH is increased to 5–5.5, these ions are almost not captured by the aluminium hydroxide precipitate. 相似文献
3.
A.?G.?Mikhailovskii A.?S.?Yusov D.?V.?Korchagin O.?V.?GashkovaEmail author 《Russian Journal of Organic Chemistry》2018,54(5):713-718
By reaction of Ritter cyclization of cyanoacetylureas with dimethylbenzylcarbinoles the corresponding enaminoureides were obtained, derivatives of 3,3-dimethyl-1,2,3,4-tetrahydroisoquinoline. The polyfunctional character of obtained compounds is confirmed by the structure of products of reaction with some electrophiles: phenyl isocyanate reacts at the γ-C atom of enamine and CONH2 group of urea, under the action of oxalyl chloride annelation of a pyrrole cycle occurs with the formation of a derivative of 2,3-dioxopyrrolo[2,1-a]isoquinoline. Reaction with ninhydrin occurs similary with enaminoamides having hydrogen atoms at the amide nitrogen: a pyrrole ring is fused with the formation of a system of indeno[1,2-b]pyrrole. 相似文献
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5.
Published data on photochemical reactions of f-element compounds, namely, uranyl ion and lanthanide and actinide ions, are surveyed and analyzed. The types of reactions of photoexcited ions, reaction mechanisms, and analytical applications of the photochemical methods for the separation, isolation, and determination of f-elements are considered. 相似文献
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I. A. Charushnikova A. M. Fedoseev A. B. Yusov C. Den Auwer 《Crystallography Reports》2005,50(2):191-193
The crystal structure of a new compound, namely, Nd2TeMo6O24 · 19H2O, is determined using X-ray diffraction. The crystal has a chain structure and consists of [Nd2TeMo6O24 · 14H2O]n neutral chains aligned parallel to the [010] direction and crystallization water molecules. In a chain, each Nd atom links two heteropoly anions. The Nd3+ environment includes seven water molecules and two oxygen atoms of the two heteropoly anions adjacent in the chain. The polyhedron is a monocapped tetragonal antiprism. In the previously studied complex of similar composition, namely, Nd2TeMo6O24 · 18H2O, the Nd coordination polyhedron has the shape of a tricapped trigonal prism formed by six water molecules and three oxygen atoms of the two heteropoly anions adjacent in the chain. 相似文献
9.
G. B. Andreev M. Yu. Antipin N. A. Budantseva E. V. Tuchina L. B. Serezhkina A. M. Fedoseev A. B. Yusov 《Russian Journal of Coordination Chemistry》2004,30(12):868-873
A complex of uranyl perchlorate with imidazolidine-2-one as the molecular ligand, [UO2(Imon)4(H2O)](ClO4)2 (I), was synthesized and structurally characterized by X-ray diffraction analysis. The coordination number of the uranium atom is 7. The nearest environment of the uranyl ion includes four O atoms of the imidazolidine-2-one molecules and one O atom of the water molecule. The perchlorate anions are outer-sphere ligands. The crystals are monoclinic: space group P21/c; a = 16.294(3) Å, b = 16.135(3) Å, c = 9.987(2) Å, = 97.69 (3)°, V = 2603.0 (9) Å3, (calcd) = 2.117 g/cm3, Z = 4. The IR and luminescence spectra of the complex were recorded.Translated from Koordinatsionnaya Khimiya, Vol. 30, No. 12, 2004, pp. 919–924.Original Russian Text Copyright © 2004 by Andreev, Antipin, Budantseva, Tuchina, Serezhkina, Fedoseev, Yusov. 相似文献