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331.
Vadim V. Popov Stanislav A. Amelichev Ivan S. Bushmarinov Lidia S. Konstantinova Konstantin A. Lyssenko Ludmila V. Mikhalchenko Valentin V. Novikov Vadim P. Gultyai Oleg A. Rakitin 《Tetrahedron》2013
The synthesis of [1,3]dithiolo[4,5-d]dithiazolium salts from readily available zinc chelate has been developed. Chlorination of 2-oxo and 2-(dicyanomethylene) (2-oxo-1,3-dithiole-4,5-diyl) diethanethioates with SO2Cl2 followed by condensation with Me3SiN3 produced 1,2,3-dithiazolium chlorides. The structure of 5-(dicyanomethylene)[1,3]dithiolo[4,5-d][1,3,2]dithiazol-1-ium tetrafluoroborate was confirmed by powder X-ray diffraction, and its chemical bonding pattern as well as charge transfer were studied within the QTAIM framework applied to the results of plane wave DFT periodic calculations. Reduction with triphenylantimony and electrochemical reduction of [1,3]dithiolo[4,5-d]dithiazolium salts by cyclic voltammetry, chronoamperometry, and microelectrolysis at a controlled potential on a platinum electrode in acetonitrile revealed the formation of [1,3]dithiolo[4,5-d]dithiazolyl radicals, which were characterized by EPR spectroscopy. 相似文献
332.
V. M. Berestovitskaya O. S. Vasil’eva E. S. Ostroglyadov I. N. Tyurenkov I. V. Anan’ev K. A. Lyssenko V. N. Perfilova V. V. Bagmetova 《Russian Chemical Bulletin》2013,62(11):2401-2406
Acid hydrolysis of 4-(het)aryl-3,5,5-tris(alkoxycarbonyl)-2-pyrrolidones obtained by the condensation of 1,1-bis(alkoxycarbonyl)ethenes with diethyl acetylaminomalonate leads to (2R*,3R*)-3-(het)arylglutamic acid hydrochlorides. 相似文献
333.
The intra- and intermolecular interactions that make a major contribution to the formation of the crystal structure were detected and characterized in the crystal of 1-[1-(methoxycarbonylmethylthio)methyl]-3,5-dimethylisocyanurate. Topological analysis of the experimental and theoretical electron density distribution was used to reveal for the first time the role of the lp(O)...π interaction in the formation of a crystal of an isocyanurate derivative and to estimate its energy. Interactions of this type were found to occur in 74% of the fully N-substituted isocyanurate structures. 相似文献
334.
M. Yu. Antipin E. P. Ivakhnenko Yu. V. Koshchienko P. A. Knyazev M. S. Korobov A. V. Chernyshev K. A. Lyssenko A. G. Starikov V. I. Minkin 《Russian Chemical Bulletin》2013,62(8):1744-1751
Adducts of cobalt(II) bis(salicylaldiminates) and 2,4,6,8-tetra-tert-butylphenoxazin-1-one were synthesized and their molecular and crystal structures were determined. According to the ESR and magnetochemical data, the metal atom is in the low-spin trivalent state (CoIII) due to the intramolecular electron transfer to the redox-active ligand. In the solid state, the mixedligand complexes are stable in air for several months, but in solution at elevated temperatures they dissociate to the starting components. Such a behavior detected by the temperature dependence of the effective magnetic moment is explained by the quantum chemical DFT calculations of the energy barriers of possible valence tautomeric dynamics, whose values were found to be higher than the enthalpy of dissociation. 相似文献
335.
Alexander S. Shaplov Elena I. Lozinskaya Ricardo Losada Christine Wandrey Alexander T. Zdvizhkov Alexander A. Korlyukov Konstantin A. Lyssenko Inna A. Malyshkina Yakov S. Vygodskii 《先进技术聚合物》2011,22(4):448-457
The achievement of high ionic conductivity in single‐ion conducting polymer electrolytes is one of the important aims for various electrochemical devices including modern lithium batteries. One way to enhance the ionic conductivity in polyelectrolyte systems is to increase the quantity of charge carriers in each monomer unit. Highly charged poly(bis‐1,3(N,N,N‐trimethylammonium)‐2‐propylmethacrylate) with one of the most conducting anions, namely dicyanamide, was prepared via free radical bulk polymerization or using ionic liquids as reaction medium. The cationic polymers of the double‐charged monomer have molar masses up to = 1,830,000 g/mol and the ionic conductivity equal to 5.51 × 10?5 S / cm at 25°C. The film forming ability, crystallinity, thermal stability, and glass transition temperatures of the new polymeric ionic liquids obtained from detailed studies are presented. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
336.
Detailed study of the nature of weak coordination K-O interactions and strong O-H···O hydrogen bonds and estimation of their energy in a potassium hydrophthalate crystal have been performed on the basis of the topological analysis of the electron density distribution function, obtained from precise X-ray diffraction study at 100 K (R1 = 0.0110), within Bader’s “Atoms in Molecule” theory. It is shown that the charge transfer accompanying the formation of cation···anion associates in the crystal is only 0.05 e. 相似文献
337.
Inga M. Aladzheva Dmitrii I. Lobanov Ol'ga V. Bykhovskaya Pavel V. Petrovskii Konstantin A. Lyssenko Tatyana A. Mastryukova 《Heteroatom Chemistry》2003,14(7):596-602
A novel facile one‐pot synthesis of the 1,2‐azaphospholanes by intramolecular alkylation of 3‐halopropyl amides of tricoordinate phosphorus has been suggested. Using this method, a series of the differently N‐substituted 1,2‐azaphospholanium salts were synthesized. 3‐Aminopropylphosphine oxides were obtained by hydrolysis of the salts. A probable mechanism of the 1,2‐azaphospholanium salts formation is discussed. © 2003 Wiley Periodicals, Inc. Heteroatom Chem 14:596–602, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.10209 相似文献
338.
Alisher F. Murtazoev Prof. Konstantin A. Lyssenko Dr. Maria M. Markina Prof. Valery A. Dolgikh Prof. Alexander N. Vasiliev Dr. Peter S. Berdonosov 《Chemphyschem》2023,24(15):e202300111
A new family of compounds ACu7TeO4(SO4)5Cl (A=Na, K, Rb, Cs) isostructural to mineral Nabokoite (K species) was synthesized by solid state and gas transport reactions in sealed ampoules and characterized in measurements of magnetization and specific heat in a wide temperature range. These complex compounds are of the utmost interest as a testing playground to study the properties of quasi-two-dimensional magnets with a square kagome lattice geometry. A quantum ground state of such a corner-sharing network is a spin liquid. Unlike idealized grid analyzed in numerous models, the square kagome lattice in nabokoites is wavy and distorted being composed of versatile triangles. Moreover, it contains “excessive” decorating magnetic ions, which makes magnetism of these objects even more complicated. The interaction of these decorating ions through virtual excitations of the square kagome lattice is accompanied by the formation of a long-range magnetic order coexisting with the spin liquid. 相似文献