Archive for 26.02.2017

Inorganica Chimica Acta, 2017, 455, 607–612

Mikhail A. Kinzhalov, Galina L. Starova, Vadim P. Boyarskiy

“Interaction of benzene-1,2-diamines with isocyanide complexes of palladium(II): Insight into the mechanism”

Inorganica Chimica Acta, 2017, 455, 607–612
источник: http://www.sciencedirect.com/science/article/pii/S0020169316302432

Reactivity of 4-toluidine (2) and 4,5-dimethylbenzene-1,2-diamine (3) were compared in coupling with the palladium-bis(isocyanide) complex cis-[PdCl2(CNXyl)2] (Xyl = 2,6-Me2C6H3, 1), mixed isocyanide/diaminocarbene species cis-[PdCl2(CNXyl){C(NHXyl)double bond; length as m-dashNH(4-C6H4CH3)}] (4), and cis-[PdCl(CNXyl){C(NHXyl)double bond; length as m-dashNHC6H2(Me)2NH2}]Cl (5). In these Pd(II)-mediated reactions, 4,5-dimethylbenzene-1,2-diamine (3) was significantly more reactive than 4-toluidine (2), leading to the first mixed bis(diaminocarbene) complex cis-[PdCl{C(NHR)double bond; length as m-dashNHC6H2X2NH2}{C(NHXyl)double bond; length as m-dashNH(4-C6H4CH3)}]Cl (6) containing two different diaminocarbene ligands. Complex 6 was isolated and characterized by elemental analyses (C, H, N), HRESI+-MS, IR, 1H and 13C{1H} NMR spectroscopies, and single-crystal X-ray diffraction.



Институт химии растворов им. Г.А. Крестова РАН приглашает молодых научных сотрудников, аспирантов, а также студентов старших курсов принять активное участие в работе XI Всероссийской школе-конференции молодых ученых «Теоретическая и экспериментальная химия жидкофазных систем» (Крестовские чтения), которая пройдет с 30 октября по 4 ноября 2017 г. в г. Иваново. Первый циркуляр.

Секция 1. Физико-химические методы исследования жидкофазных растворов
   1.1. Теория и моделирования жидкофазных растворов (Молекулярная динамика, Монте-Карло, Квантовая химия, методы статистической термодинамики)
   1.2. Методы молекулярной спектроскопии в исследовании биологических и фармацевтических сред.
   1.3. Электрохимия растворов и расплавов солей
Секция 2. Супрамолекулярная химия и наноматериалы
   2.1. Макрогетероциклические соединения и новые материалы на их основе.
   2.2. Полимерные нанокомпозитные материалы: технологии получения и модификации.
   2.3. Золь-гель технологии для получения современных наноматериалов.
   2.4. Технологии получения супрамолекулярных систем на основе лекарственных соединений.
   2.5. Сверхкритические технологии получения наноматериалов

Glass Phys Chem, 2017, 43, 70–74

V.V. Tomaev, A.S. Mazur, A.S. Grevtsev

“A study of the process of thermal oxidation of lead selenide by the NMR and XRD methods”

Glass Phys. Chem., 2017, 43, 70–74

Studies of the process of oxidation of powder samples of lead selenide in a dry air atmosphere have been performed. As shown by the methods of X-ray diffraction and scanning electron microscopy, the process of thermal treatment of samples resulted in the formation of the PbSeO3 phase, aside from the initial PbSe phase. Studies by the method of nuclear magnetic response (NMR) allowed revealing the dynamics of changes in the spectrum under the changed thermal treatment conditions.


Eur. J. Mineral., 2016, 28, 931–941

T.L. Panikorovskii, S.V. Krivovichev, E.V. Galuskin, V.V. Shilovskikh, A.S. Mazur, A.V. Bazai

“Si-deficient, OH-substituted, boron-bearing vesuvianite from Sakha-Yakutia, Russia: a combined single-crystal, 1H MAS-NMR and IR spectroscopic study”

Eur. J. Mineral., 2016, 28, 931–941

источник: http://www.ingentaconnect.com/content/schweiz/ejm/2016/00000028/00000005/art00006

Single crystals of Si-deficient vesuvianite with significant degree of hydrogarnet-type (SiO4)4−–(O4 H4)4− substitution occur as epitactic overgrowth on the surface of large wiluite crystals from the Wiluy River, Sakha–Yakutia, Russia. Electron-microprobe analysis revealed considerable Si-deficiency, Si ranging from 16.30 to 17.50 apfu. The crystal structure of the mineral has been refined in the P4/nnc space group, a = 15.5876(4), b = 11.8021(5) Å to R 1 = 0.028 for 1533 unique observed reflections. The refinement of the site-occupancy factors confirmed significant vacancy at the Z(1) and Z(2) sites (27% and 10%, respectively), with associated increase of the Z(1)–O and Z(2)–O bond lengths to 1.697 and 1.655 Å, respectively. The increased size of the Z(1) tetrahedra results in the compression of the X(1) polyhedra, while the expansion of the Z(2) tetrahedra is compensated by the compression of the X(4) polyhedra. As a result, the significant degree of the hydrogarnet-type substitutions does not have an essential influence upon the unit-cell parameters compared to the usual defect-free vesuvianite. Thermogravimetric (TGA) and differential scanning calorimetry (DSC) curves indicated two steps of the weight loss in the temperature ranges of 600–900°C (2.08 wt%) and 1014°C (2.22 wt%). The total weight loss is estimated as 4.30%, which is in good agreement with the total content of OH estimated as 13.72 apfu. The 1H solid state MAS-NMR demonstrates the presence of a strong additional line at 3.38 ppm compared to the usual vesuvianite, which is explained by the existence of the additional H(3) site. The infrared spectrum in the OH-stretching vibration region shows the additional (B′) absorption band at 3618 cm−1 typical for a hydrogarnet-type substitution.



Сегодня в РЦ МРМИ прошла обзорная экскурсия для гостей из Агенства Стратегических Инициатив. В рамках экскурсии проведена демонстрация оборудования, приведены примеры некоторых решаемых задач пользователей РЦ. Обсуждались особености постановки исследовательских задач и пути их решения.


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Выполнено 178 заявок на исследовательскую работу.