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[en] Orbital interaction analysis is employed to understand the complex charge transfer mechanism operative in endohedral metallofullerenes of composition NSc3-C n (n = 68, 78). This phenomenon combines substantial electron transfer from the core to the cage with electron backdonation, involving the interaction between the occupied orbitals of the negatively charged cage and the unoccupied d orbitals of the positively charged core. This electron backdonation differs fundamentally from conventional orbital hybridization, which takes place primarily between the HOMO of the metal core and the LUMO of the fullerene cage. These findings imply the pronounced stability of NSc3-C n (n = 68, 78), especially for NSc3 encapsulated in the non-IPR C68 enclosure, as experimentally established
Journal
No abstract available
Journal
Vestnik Moskovskogo Universiteta, Seriya 2. Khimiya; ISSN 0579-9384; 
; v. 22(1); p. 116
; v. 22(1); p. 116
[en] Short communication
Journal
[en] A new system using a polarographic adsorptive wave for determining trace scandium was proposed. In 0.2 mol/L NH4OAc, the Sc(III)-ACBK [1,8-dihydroxy-2-(2-hydroxy-5-sulfo-1-phenylazo)-3,6-disulfo-naphthalene, called acid chrome blue K] complex emerged a sensitive adsorptive complex wave (Ep' = -0.67V). The molar ratio of Sc(III) to ACBK in the complex was established as 1:2 and the apparent stability constant β2 = 2.7 x 1015. But for Y(III), the molar ratio was 1:1 and β=1.5 x 105. Because of the particularity of Sc complex, the sensitivity and the selectivity of determination Sc is much better than that of other rare earth ions. The detection limits is 1.1 x 10-7 mol/L for oscillopolarography and 2.0 x 10-8 mol/L for adsorptive stripping voltammetry
Journal
[en] Extraction of acid and interphase distribution of 1-alkyl-3-methyl-2-pyrazoline-5-ones in the system water-chloroform-perchloric acid are studied. Reagents capable to extract scandium cations from subacid solutions in the presence of perchlorate ions. 1-Alkyl-3-methyl-2-pyrazoline-5-ones stratifies aqueous solutions of perchloric acid into two liquid phase. Scandium ions are concentrated in the lower phase having small volume
[ru]
Изучены экстракция кислоты и межфазное распределение 1-алкил-3-метил-2-пиразолин-5-онов в системе вода-хлороформ-хлорная кислота. Реагенты способны экстрагировать катионы скандия из слабокислых растворов в присутствии перхлорат-ионов. 1-Алкил-3-метил-2-пиразолин-5-оны расслаивают водные растворы хлорной кислоты на две жидкие фазы. Ионы скандия концентрируются в нижней фазе, имеющей малый объемJournal
No abstract available
Source
Naumov, N.G. (ed.); Ministerstvo Nauki i Vysshego Obrazovaniya RF, Moscow (Russian Federation); Rossijskaya Akademiya Nauk, Moscow (Russian Federation); Inst. Neorganicheskoj Khimii im. A.V. Nikolaeva SO RAN, Novosibirsk (Russian Federation); Federal'nyj Issledovatel'skij Tsentr «Kazanskij Nauchnyj Tsentr RAN», Kazan' (Russian Federation); Inst. Organicheskoj i Fizicheskoj Khimii im. A.E. Arbuzova, Kazan' (Russian Federation); Respublikanskoe Khimicheskoe Obshchestvo im. D.I. Mendeleeva Tatarstana, Kazan' (Russian Federation); 139 p; ISBN 978-5-90168-848-9; ; 2022; p. 64; All-Russian conference with international participation on 7. Russian Day of Rare Earth; Vserossijskaya konferentsiya s mezhdunarodnym uchastiem «VII Rossijskij den' redkikh zemel'»; Kazan' (Russian Federation); 14-16 Feb 2022; 2 refs., 1 fig.
; 2022; p. 64; All-Russian conference with international participation on 7. Russian Day of Rare Earth; Vserossijskaya konferentsiya s mezhdunarodnym uchastiem «VII Rossijskij den' redkikh zemel'»; Kazan' (Russian Federation); 14-16 Feb 2022; 2 refs., 1 fig.
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