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    2,3-Epoxyperfluoro-2-methylpentane in reactions with urea and thiourea [Electronic resource] / T. I. Filyakova, V. I. Saloutin, A. Ya. Zapevalov, P. A. Slepukhin, M. I. Kodess, V. I. Saloutin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2011. - Vol. 47, № 5. - P650-658 : рис., табл. - Bibliogr. : p. 658 (24 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 2,3-Epoxyperfluoro-2-methylpentane reacts with thiourea in protic (methanol, 2-propanol) and aprotic (dioxane) solvents, and also with urea in acetonitrile affording unexpected products: 1-(2,2,3,3,3-pentafluoropropionyl)-2-(2,2,2-trifluoro-1-trifluoro-methylethyl)isothiourea, and 1-(2,2,3,3,3-pentafluoropropionyl)-3-(2,2,2-trifluoro-1-trifluoro-methylethyl)urea respectively that result from the rearrangement of the intermediately formed ketone in the process of the intramolecular “haloform” cleavage. At the same time in dioxane the 2,3-epoxyperfluoro-2-methylpentane reacts with urea with the formation of a heterocyclic compound, 2-amino-4-pentafluoroethyl-5,5-bis(trifluoromethyl)-4,5-dihydrooxazol-4-ol. From 1-(2,2,3,3,3-pentafluoropropionyl)-2-(2,2,2-trifluoro-1-trifluoromethylethyl)isothiourea and Cu(OAc)2 a stable fluorine-containing chelate complex was obtained

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2011, 47 (5), 650-658.pdf
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    2,3-эпоксиперфтор-2-метилпентан в рекциях с мочевиной и тиомочевиной [] / Т. И. Филякова, Л. В. Салоутина, А. Я. Запевалов, П. А. Слепухин, М. И. Кодесс, В. И. Салоутин // Журнал органической химии. - 2011. - Т. 47. № 5. - С. 649-657 : граф., табл. - Библиогр.: с. 656-657 (24 назв.)

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 2,3-Эпоксиперфтор-2-метиллентан взаимодействуют с тиомочевиной в протонных (метанол, изопропанол) и апротонных (диоксан) растворителях, а также с мочевиной в ацетонитонитриле, образуя неожиданные продукты: 1-(2,2,3,3,3-пентафторпропиониз)-2-(2,2,2-трифтор-1-трифтор-метилэтил) изотиомочевину и 1-(2,2,3,3,3-пентафторпропионил)-3-(2,2,2-трифтор-1-трифтор-метилэтил) мочевину соответственно, которые являются результатом перегруппировки промежуточно образующегося кетона в процессе внутримолекулярной реакции "галоформного" расщепления. В то же время в диоксане 2,3-эпоксиперфтор-2-метилпентан реагирует с мочевиной с образованием гетероциклического соединения - 2-амино-4-пентафторэтил-5,5-бис(трифтор-метил)-4,5-дигидрооксазол-4-ола. На основе 1-(2,2,3,3,3-пентафторпропионил)-2-(2,2,2-трифтор-1-трифторметилэтил) изотиомочевины и Cu(OAc)2 получен устойчивый фторсодержащий хелатный комплекс.

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    3,3,3-Trifluoro-N-(3-trifluoromethylphenyl)-1,2-propanediamine and its N-mono-and N,N-dicarboxyethyl derivatives: synthesis, protolytic and complexation properties [Electronic resource] / V. Yu. Korotaev, Yu. A. Skorik, A. Yu. Barkov, M. I. Kodess, A. Ya. Zapevalov // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2005. - Vol. 54, № 11. - P2545-2549

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 3,3,3-Trifluoro-N-(3-trifluoromethylphenyl)-1,2-propanediamine (5) was synthesized by the reaction of 2-diazo-1,1,1-trifluoro-3-nitropropane or 3,3,3-trifluoro-1-nitropropene with 3-aminobenzotrifluoride followed by the reduction of the nitro group. The Michael 1,4-addition of diamine 5 to acrylic acid occurs only at the N(1) atom and affords N-mono-or N,N-dicarboxyethyl derivatives 6 and 7, depending on the reactant ratio. Protolytic equilibria 5–7 in aqueous solutions were studied by pH-potentiometry and UV spectroscopy. Only the aliphatic amino group can be protonated in an aqueous solution, while the aromatic amino group remains unprotonated even in 12 M HCl. The stability constants of transition metal (Cu2+, Ni2+, Zn2+) complexes with ligands 5–7 were determined by pH-potentiometric titration. The stability of the complexes and selectivity of the ligands toward Cu2+ ions increase with an increase in the number of N-carboxyethyl groups

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2005, 54 (11), 2545.pdf
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    5-Acylmethyl-3-(2-pyridyl)-1,2,4-triazines: Synthesis and Complexes with Cu(II) [Electronic resource] / A. M. Prokhorov, D. N. Kozhevnikov, V. L. Rusinov, A. I. Matern, M. M. Nikitin, O. N. Chupakhin, I. L. Eremenko, G. G. Aleksandrov // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2005. - Vol. 41, № 11. - P1702-1705

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 5-Acylmethyl-3-(2-pyridyl)-1,2,4-triazines are easily prepared from accessible 3-(2-pyridyl)-1,2,4-triazine 4-oxides by reaction of the latter with acetophenone or trifluoroacetone in the presence of NaH. The compounds obtained behaved as efficient ligands in reaction with CuCl2 furnishing dimeric neutral complexes with Cu(II) whose structure was investigated by means of X-ray diffraction analysis

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2005, 41 (11), 1702-1705.pdf
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   П 99


    5-Ацилметил-3-(2-пиридил)-1,2.4-триазины: синтез и комплексы c Cu(II) [] / А. М. Прохоров, Д. Н. Кожевников, В. Л. Русинов, А. И. Матерн, М. М. Никитин, И. Л. Еременко, Г. Г. Александров, О. Н. Чупахин // Журнал органической химии. - 2005. - Т. 41, N 11. - 1736-1739: рис. - Библиогр. : с. 1739 (15 назв.) . - ISSN 0514-7492

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
5-АЦИЛМЕТИЛ-3-(2-ПИРИДИЛ)-1,2,4-ТРИАЗИДЫ -- 3-(2-ПИРИДИЛ)-1,2,4-ТРИАЗИН-4-ОКСИДЫ -- АЦЕТОФЕНОНЫ -- трифторацетоны -- ИГАНДЫ -- МЕТОД РСА -- СИНТЕЗ -- КОМПЛЕКСЫ С CU(II)
Аннотация: 5-Ацилметил-3-(2-пиридил)-1,2,4-триазины могут быть легко получены по реакции доступных 3-(2-пиридил)-1,2.4-триазин-4-оксидов с ацетофеноном или трифторацетоном в присутствии NaH. Полученные соединения выступают как эффективные лиганды в реакции с CuCL2, образуя димерные нейтральные комплексы с Cu(II), cтроение которых изучено методом РСА.

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   B 62


    Bis[N-(2-hydroxyethyl)-beta-alaninato]-copper(II) [Text] / A. V. Pestov, E. V. Peresypkina, A. V. Virovets, N. V. Podberezskaya, Yu. G. Yatluk, Yu. A. Skorik // Acta Crystallographica Section C: Crystal Structure Communications. - 2005. - Vol. 61, № 12. - Pm510-m512

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The CuII ion in the title complex, [Cu(C5H 10NO3)2] or [Cu(He-ala)2] [He-ala = W-(2-hydroxyethyl)-?-alaninate], resides at the inversion centre of a square bipyramid comprised of two facially arranged tridentate He-ala ligands. Each He-ala ligand binds to a CuII ion by forming one six-membered ?-alaninate chelate ring in a twist conformation and one five-membered ethanolamine ring in an envelope conformation, with Cu-N = 2.017 (2) A, Cu-OCoo = 1.968 (1) A and Cu-OOH = 2.473 (2) A. The [Cu(He-ala)2] molecules are involved in a network of O-H?O and N-H?O hydrogen bonds, forming layers parallel to the (101?) plane. The layers are connected into a three-dimensional structure by van der Waals interactions, so that the molecular centres form pseudo-face-centered close packing. © 2005 International Union of Crystallography????

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   C 31


    Catalytic effect of nanosized metal oxides on the knoevenagel reaction / Yu. A. Titova, O. V. Fedorova, I. G. Ovchinnikova, G. L. Rusinov, V. N. Charushin // Russian Journal of Applied Chemistry. - 2012. - Vol.85, №4. - С. 656-660

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CATALYTIC EFFECT -- METAL OXIDES -- KNOEVENAGEL REACTION
Аннотация: The effect of nanosized metal oxides (Al, Mg, Cu, Ni oxides) on the synthesis of chalcones that are key intermediate in the synthesis of Nitrendipine and Felodipine drugs was examined

\\\\Expert2\\nbo\\Russian Journal of Applied Chemistry\\2012, v. 85, N 4, p.656.pdf
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   C 74


    Complexation models of N-(2-carboxyethyl)chitosans with copper(II) ions [Text] / Yu. A. Skorik, C. A. R. Gomes, N. V. Podberezskaya, G. V. Romanenko, L. F. Pinto, Yu. G. Yatluk // Biomacromolecules. - 2005. - Vol. 6, № 1. - P189-195 . - ISSN 1525-7797

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The copper(II) complex formation equilibria of N-(2-carboxyethyl)chitosans with three different degrees of substitution (DS = 0.42, 0.92, and 1.61) were studied in aqueous solution by pH-potentiometric and UV-spectrophotometric techniques. It was demonstrated that the complexation model of CE-chitosans depends on DS: the [Cu(Glc-NR2)2] complexes are predominant for two lower substituted samples ("bridge model", log ?12 = 10.06 and 11.6, respectively), whereas the increase of DS leads to formation mainly of the [Cu(Glc-NR2)] complexes ("pendant model", log ?11 = 6.41). As a model for copper complexation with a disubstituted residue of CE-chitosan, the complex of N-methyliminodipropionate [CuMidp(H2O)]·(H2O) was synthesized and structurally characterized by XRD. The unit cell consists of two crystallographically nonequivalent Cu atoms having slightly distorted square pyramidal coordination; Midp constitutes the basal plane of the pyramid and acts as a tetradentate NO3 chelate-bridging ligand by the formation of two six-membered chelate rings (average Cu-O 1.99 A, Cu-N 2.04 A) and a bridge via carbonyl O atom (average Cu-O 1.99 A), an apical position is occupied by a water molecule (average Cu-Ow 2.30 A).

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   C 74


    Complexes of mono- and bis(2-carboxyethyl)-2-picolylamine: Synthesis and crystal and molecular structures [Electronic resource] / A. V. Pestov, A. E. Permyakov, P. A. Slepukhin, L. K. Neudachina, Yu. G. Yatluk // Russian Journal of Coordination Chemistry. - 2010. - Vol. 36, № 10. - P769-777

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: N-(2-Pyridylmethyl)iminodipropionic (I) and N-(2-pyridylmethyl)-3-aminopropionic acids (II) were obtained. A reaction of acid I with a Cu(II) salt gave a 2: 2 complex (III); a reaction of acid II with a Ni(II) salt yielded a 1 : 2 complex (IV). The crystal structures of these complexes were determined by X-ray diffraction. The abilities of compounds I and II to form complexes were compared with the literature data for other ligands containing the N-(2-pyridylmethyl)amino fragment. The structural features of the chelate complexes with 2-aminomethylpyridine derivatives were revealed, depending on the other substituents and the metal center

\\\\Expert2\\nbo\\Russian Journal of Coordination Chemistry\\2010, v. 36, N. 10, p.769.pdf
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10.

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    Conjugates of 8-[2,2’-bipyridinyl]coumarins as potential chemosensors for Al3+, Cu2+, Cd2+, Zn2+ ions: synthesis and photophysical properties / A. D. Sharapov, R. F. Fatykhov, I. A. Khalymbadzha [et al.] // Chimica Techno Acta. - 2023. - Vol. 10, № 4. - P202310417
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CHEMOSENSORS -- COUMARINS -- 2,2’-BIPYRIDINES
Аннотация: In this work, we report the synthesis of novel coumarin-bipyridine conjugates using a sequence of C-C coupling reaction between 5,7-dimethoxycoumarins and 3-pyridyl-6-aryl-1,2,4-triazines followed by the Boger reaction with norbornandiene to obtain 8-[2,2'-bipyridyl]-5,7-dimethoxycoumarins. Photophysical properties were investigated for the obtained series of 8-[2,2'-bipyridyl]-5,7-dimethoxycoumarins: absorption and emission wavelength maxima are in the region of 212-296 and 401-410 nm, respectively; Stokes shifts are up to 116 nm, and fluorescence quantum yields are up to 15.0%. It was found that titrating the conjugates with Al3+, Zn2+, and Cd2+ ions results in an increase in the intensity of the emission maxima of the complexes, while the opposite effect was observed in the case of titration with Cu2+ ions. These findings suggest that the studied compounds may be considered as promising chemosensing materials. Finally, a positive solvatochromism of 8-[2,2'-bipyridyl]coumarins and their metal complexes was established. The experimental data are supported by mathematical calculations according to the Lippert-Matagaequation and Kosower diagram.

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11.

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   C 91


    Crystal structure of copper(II) chelate with para-(tert-butyl)benzoic acid N′,N′-dimethylhydrazide / V. Yu. Gusev, D. A. Muksinova, P. A. Slepukhin, A. V. Radushev // Russian Journal of Coordination Chemistry. - 2012. - Vol.38, №8. - С. 515-518

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CRYSTAL STRUCTURE -- N′,N′-DIMETHYLHYDRAZIDE -- BENZOIC ACID
Аннотация: X-Ray diffraction analysis was performed for the copper(II) chelate with para-(tert-butyl)benzoic acid N′,N′-dimethylhydrazide, Cu(p-(tert-Bu)C6H4CONHNMe2)2 (I). The reagent functions as a bidentate (O,N(2)) ligand giving a five-membered copper-containing ring. The molecule is centrosymmetric. The Cu atom and the metal rings lie in the same plane. The coordination polyhedron of copper is a slightly distorted square. The crystals are monoclinic: a = 16.2634(14) Å, b = 9.0415(8) Å, c = 9.6415(9) Å, α = 90°, β = 100.052(7)°, Z = 2, space group P21/c.

\\\\Expert2\\nbo\\Russian Journal of Coordination Chemistry\\2012, v. 38, N. 8, p.515.pdf
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12.

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   C 91


    Crystal structure of N-(3-hydroxypropyl)-beta-alanine and Bis(N-(3-hydroxypropyl)-beta-alaninato)dicopper(II) [Cu2 (Pro-ala)2] [Electronic resource] / A. V. Pestov, P. A. Slepukhin, L. S. Molochnikov, M. A. Ezhikova, M. I. Kodess, Yu. G. Yatluk // Russian Journal of Inorganic Chemistry (Zhurnal Neorganicheskoi Khimii). - 2010. - Vol. 55, № 2. - P201-208

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: N-(3-Hydroxypropyl)-beta-alanine was synthesized by the reacti on of 3-aminopropanol with acrylic acid. From this ligand and basic copper carbonate, bis(N-(3-hydroxypropyl)-beta-alaninato)dicopper(II) [Cu2 (C6H11NO3)2] was obtained. The structures of the chelating agent and the copper complex were studied by X-ray diffraction. The Cu(II) coordination polyhedron is a distorted square pyramid. Each ligand forms six-membered ?-alaninate and propanolamine chelate rings. The propoxy group functions as a bridge. In the crystal structure, the molecules form intermolecular coordination bonds C=OCu, which are perpendicular to the layers. The EPR signal typical of dimeric copper complexes is not observed due to low occupancy of the excited paramagnetic triplet state. The weak paramagnetic signal from monomeric copper complex allowed recording of the 1H NMR spectrum of [Cu2 (Pro-ala) 2] with characteristic line broadening and contact shift. It follows from the obtained data that on dissolution, the complex dissociates by 40% to give monomeric copper complexes

\\\\Expert2\\nbo\\Russian Journal of Inorganic Chemistry\\2010, v. 55, N 2, с.201.pdf
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13.

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   C 99


    Cинтез, строение и комплексообразование фторированных 1,3-енаминокетонов, содержащих при атоме азота заместители с терминальными связями C=C / Е. Ф. Жилина, П. А. Слепухин, Н. С. Болтачева, М. Г. Первова, Д. Л. Чижов, В. И. Филякова, В. Н. Чарушин // Журнал общей химии. - 2012. - Т.82, №12. - С. 2008-1015. - Библиогр.: с. 2015 (16 назв.)

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
СИНТЕЗ -- КОМПЛЕКСООБРАЗОВАНИЕ -- ЕНАМИНОКЕТОНЫ
Аннотация: Взаимодействием фторированных 1,3-дикетонатов лития с гидрохлоридом пропаргиламина, а также 1,1,1-трифторпентан-2,4-диона или 1,1,1-трифтор-4-метоксипент-3-ен-2-она с пропаргиламином и 3-аминофенилацетиленом получены фторированные 1,3-енаминокетоны, содержащие при атоме азота заместители с терминальными связями С≡С: (Z)-1,1,1-трифтор-4-(2-пропиниламино)-3-пентен-2-он, (Z)-1,1,2,2-тетрафтор-5-(2-пропиниламино)-4-гексен-3-он и 4-(3-этинилфениламино)-1,1,1-трифторпент-3-ен-2-он. Реакции 4-(3-этинилфениламино)-1,1,1-трифторпент-3-ен-2-она с ацетатом Cu(II) или наноразмерными порошками меди и ее оксидов приводят к хелатному комплексу. Строение (Z)-1,1,2,2-тетрафтор-5-(2-пропиниламино)-4-гексен-3-она и медного комплекса 4-(3-этинилфениламино)-1,1,1-трифторпент-3-ен-2-она установлено методом РСА.

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14.

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   S 66

    Skorik, Yu. A.
    Evaluation of various chitin-glucan derivatives from Aspergillus niger as transition metal adsorbents [Text] / Yu. A. Skorik, A. V. Pestov, Yu. G. Yatluk // Bioresource Technology . - 2010. - Vol. 101, № 6. - P1769-1775

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A number of chelating resins were prepared by chemical derivatization of the chitin-glucan (CG) complex isolated from Aspergillus niger biomass, namely chitosan-glucan (CsG), O-carboxymethyl-chitin-glucan (CM-CG), O-(2-sulfoethyl)chitin-glucan (SE-CG), and N-(2-carboxyethyl)chitosan-glucan (CE-CsG). The chemical modification was confirmed by FT-IR and elemental analysis. Nanosecond electron beam irradiation was used to produce insoluble resins and to preserve the reactive functional groups. Batch experiments were carried out to evaluate the adsorption selectivity and capacity of the resins toward transition metal ions (Cu2+, Ni2+, Co2+, Zn2+). The resins showed good adsorption capability with the following selectivity series: Co2+ Ni2+ Cu2+ Zn2+. The total metal adsorption capacities of CG, CsG, CM-CG, SE-CG, and CE-CsG resins at pH 6.5 (ammonium acetate buffer) were found to be 0.205, 0.382, 1.752, 0.319, and 0.350 mmol g?1, respectively. Our results suggest that, depending on the type of chemical modification, the chitin-glucan complexes can be used either for selective Cu2+ removal (CsG) or for total transition metal adsorption (CM-CG) from aqueous effluents

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15.

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   F 42


    Ferro- and antiferromagnetic interactions in polymeric and molecular complexes of Cu(hfac)2 with 1-oxoazin-2-yl-substituted nitronyl nitroxides [Text] / O. N. Chupakhin, E. V. Tretyakov, I. A. Utepova, M. V. Varaksin, G. V. Romanenko, A. S. Bogomyakov, S. L. Veber, V. Ovcharenko // Polyhedron. - 2011. - Vol. 30, № 4. - P647-653. - Bibliogr. : p. 653 (9 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Solid heterospin compounds based on Cu(hfac)2 complexes with a new group of nitronyl nitroxides bearing different azine-N-oxide substituents at position 2 of the 2-imidazoline ring (Ln) were studied. The major factor responsible for the change in the magnetic characteristics of the [Cu(hfac)2L1] complex with triazine nitronyl nitroxide with temperature was shown to be the specific pairwise packing of heterospin molecules with the dominant antiferromagnetic exchange between the radical fragments of adjacent molecules. For complexes of Cu(hfac)2 with 1-oxoazin-2-yl-substituted nitronyl nitroxides L2 and L4, 7-membered metallocycles were obtained, although they form rarely. It was shown that polymer chains formed in the solid complex with spin-labeled pyrazine-N-oxide [(Cu(hfac)2)3(L3)2] due to the cross-linking of {(Cu(hfac)2)2(L3)2} binuclear fragments via the bridging [Cu(hfac)2].????

\\\\Expert2\\nbo\\Polyhedron\\2011. v.30. p.647.pdf
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16.

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   F 70


    Fluorinated lithium 1,3-diketonates as reagents to modify podands and crown-ethers [Electronic resource] / N. S. Boltacheva, O. V. Fedorova, I. G. Ovchinnikova, O. N. Kazheva, A. N. Chekhlov, O. A. Dyachenko, G. L. Rusinov, V. I. Filyakova, V. N. Charushin // Journal of Fluorine Chemistry. - 2007. - Vol. 128, № 7. - P762-768

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Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Fluorinated enaminoketones, a new type of ligands, bearing two independent coordination centers (polyether's and fluorinated enaminoketones fragments) have been obtained. The crystal structure of the Cu(II) complex of 1,5-bis-[2-(4`,4`,4`-trifluoro-1`-methyl-3`oxo-but-1`-enylamino)-phenoxy]-3-oxapentane (10) has been elucidated by X-ray crystallography. The results obtained show that the complex 10 consists of two crystallographically independent molecules C26H24CuF6N2O5 (A and B), and the metal atom in the complex 10 has four-coordinated arrangement, as a polyhedron with a distorted square with two nitrogen and two oxygen atoms located in corners.

\\\\expert2\\nbo\\Journal of Fluorine Chemistry\\2007, v.128. p.762.pdf
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17.

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    Functionalization of halloysite with N-(2-aminoethyl)-3-aminopropyl-trimethoxysilane / V. A. Osipova, A. V. Pestov, A. V. Mekhaev [et al.] // Russian chemical bulletin. - 2021. - Vol. 70, № 6. - P1180-1184
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
HALLOYSITE -- N-(2-AMINOETHYL)-3-AMINOPROPYLTRIMETHOXYSILANE -- SORPTION OF cU(II)
Аннотация: In order to increase the affinity of the halloysite mineral to 3d-metal ions, its surface was functionalized with N-(2-aminoethyl)-3-aminopropyltrimethoxysilane. A significant influence of the nature of the solvent and silane concentration on the degree of functionalization of halloysite was revealed. According to the data of elemental analysis, FTIR spectroscopy, and thermogravimetry, it was found that the most efficient solvents were tetrahydrofuran and acetonitrile at an equimolar silane to halloysite ratio. The functionalization of halloysite with N-(2-aminoethyl)-3-aminopropylsilyl groups significantly increases the sorption capacity of the material in comparison with both unmodified halloysite and halloysite functionalized with non-chelating 3-aminopropylsilyl groups.

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18.

Инвентарный номер: нет.

   H 43


    Heavy metals removal by flocculation/precipitation using N-(2-carboxyethyl)chitosans [Text] / S. YU. Bratskaya, A. V. Pestov, Yu. G. Yatluk, V. A. Avramenko // Colloids and Surfaces A: Physicochemical and Engineering Aspects. - 2009. - Vol. 339, № 1-3. - P140-144

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Here we report on solution properties and flocculation performance of polyampholyte chitosan derivatives - N-carboxyethylated chitosans (CEC) - synthesized "in gel" by treatment of chitosan with acrylic acid. We show that carboxyethylation with the substitution degrees (DS) from 0.7 to 1.6 yields water-soluble derivatives, whose isoelectric points (IEP) range from 6.30 to 3.55. At pH 7.5 interaction of negatively charged CEC derivatives with positively charged colloids of the heavy metal hydroxides (Zn2+, Cu2+, Ni2+), serving as a model of postgalvanic wastewaters, results in lowering of electrokinetic potential of the hydroxide colloids and their precipitation at appropriate flocculant dose. Investigations of CEC flocculation performance depending on pH and DS show that the efficiency of metal removal decreases in the row Cu2+ Zn2+ Ni2+ corresponding to the row of the hydroxocomplex stability for these metals. The higher was pH of the system and DS of CEC derivative, the narrower was the flocculation window and the stronger was negative effect of flocculant overdosing on the efficiency of heavy metal removal. Based on the estimation of floc settling rates and the residual metal concentrations, we have concluded that the optimal DS of CEC derivatives for the precipitation of metal hydroxides is 0.7-1.0

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19.

Инвентарный номер: нет.

   H 62


    Heterocyclic and Open-Chain Carboranes via Transition-Metal-Free C-H Functionalization of Mono- and Diazine-N-oxides [Electronic resource] / L. A. Galliamova, M. V. Varaksin, O. N. Chupakhin, P. A. Slepukhin, V. N. Charushin // Organometallics. - 2015. - Vol. 34, № 21. - С. 5285-5290. - Bibliogr. : p. 5290 (27 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CYCLOMETALATED IRIDIUM COMPLEXES -- NEUTRON-CAPTURE THERAPY -- PHARMACOPHORES
Аннотация: For the first time, the direct C(sp(2))-H functionalization methodology has successfully been applied to cause nucleophilic modification of mono- and diazine-N-oxides with the 1,2-closo-carborane moiety. As a result of these cross-coupling reactions uncatalyzed by transition metals, a series of novel C-modified heterocyclic and open-chain (vinyl acetylene) carboranes have been obtained. Complexes of phenanthrolinyl-substituted omicron-carborane with Cu(II) of various architectures have been synthesized.

\\\\expert2\\nbo\\Organometallics\\2015. V. 34, N 21. P. 5285.pdf
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20.

Инвентарный номер: нет.

   H 62


    Heterospin complexes based on dinuclear CuII triketonate and nitroxides [Electronic resource] / V. Ovcharenko, S. V. Fokin, G. V. Romanenko, V. Ikorskii, R. S. Sagdeev, D. S. Yachevskii, D. L. Chizhov, V. N. Charushin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2006. - Vol. 55, № 11. - P1904-1908

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Heterospin complexes of bis(?2-1,1,2,2,8,8,9,9-octafluorononane-3,5,7-trionato)dicopper(II) ([Cu2L2]) with nitronyl nitroxides 2-(1-methyl-1H-pyrazol-4-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-1-oxyl 3-oxide (2) and 4,4,5,5-tetramethyl-2-(3-pyridinyl)-4,5-dihydro-1H-imidazole-1-oxyl 3-oxide (1) were synthesized and structurally characterized. Crystals of the complexes are formed by the discrete bis[1-methyl-4-(4,4,5,5-tetramethyl-3-oxide-1-oxyl-4,5-dihydro-1H-imidazol-2-yl)-1H-pyrazole]-bis (?2-1,1,2,2,8,8,9,9-octafluorononane-3,5,7-trionato)dicopper(II) etherate (3) and bis[3-(4,4,5,5-tetramethyl-3-oxide-1-oxyl-4,5-dihydro-1H-imidazol-2-yl)pyridine]-bis (?2-1,1,2,2,8,8,9,9-octafluorononane-3,5,7-trionato)dicopper(II) (4) molecules. Each Cu atom of the dinuclear chelate fragment coordinates one paramagnetic ligand through the N atom of the pyrazole or pyridine fragment, respectively. In complex 3, the paramagnetic ligands are located on one side of the plane of the chelate fragment, whereas the ligands in complex 4 are located above and below the plane of the chelate fragment. The magnetic properties of complexes 3 and 4 are determined by dominant antiferromagnetic exchange interactions between the unpaired electrons of the CuII atoms in the dinuclear Cu2L2 moiety

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2006, 55 (11), 1904.pdf
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