ВВ

Владимир В. Чернышев

Lomonosov Moscow State University

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ВА

В. А. Тафеенко

Lomonosov Moscow State University

110

L. A. Aslanov

Lomonosov Moscow State University

G. I. Nikishin

N.D. Zelinsky Institute of Organic Chemistry

A. V. Yatsenko

Research Institute of Agriculture of Crimea

ВИ

В. И. Исаева

N.D. Zelinsky Institute of Organic Chemistry

ЛМ

Л. М. Кустов

Lomonosov Moscow State University

Victor B. Rybakov

Lomonosov Moscow State University

K.A. Paseshnichenko

Lomonosov Moscow State University

Alexander O. Terent’ev

N.D. Zelinsky Institute of Organic Chemistry

Andrew N. Fitch

European Synchrotron Radiation Facility

Cooperative Institutions

Russian Academy of Sciences

259

Lomonosov Moscow State University

225

Moscow State University

120

N.D. Zelinsky Institute of Organic Chemistry

107

Frumkin Institute of Physical Chemistry and Electrochemistry

Moscow State University of Fine Chemical Technologies

NS Kurnakova Institute of General and Inorganic Chemistry

A. N. Nesmeyanov Institute of Organoelement Compounds

D. Mendeleyev University of Chemical Technology of Russia

Kurchatov Institute

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Russian Journal of General Chemistry (2003)

V. M. Berestovitskaya I. E. Efremova Alexander V. Belyakov В. А. Тафеенко Artem M. Abakumov

Envelope (radar)

10.1023/a:1024918205841

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Citations (0)

Diamidophosphites from β-hydroxyamides: readily assembled ligands for Pd-catalyzed asymmetric allylic substitution

Dalton Transactions (2020)

Ilya V. Chuchelkin Konstantin N. Gavrilov Nataliya E. Borisova Alexander M. Perepukhov Alexander V. Maximychev

Two groups of modular chiral diamidophosphite ligands were easily synthesised from accessible N-Boc-amino alcohols and pseudodipeptides. The reaction of these compounds with [Pd(allyl)Cl]2 in the presence of AgBF4 yielded complexes [Pd(allyl)(L)2]BF4. In addition, metallochelates [Pd(allyl)(L)]BF4 with (S)-methioninol-based P,S-bidentate ligands were prepared. The structures of the novel ligands and complexes were elucidated by means of 2D-NMR and were confirmed by single-crystal X-ray diffraction, as well as by DFT calculations. Asymmetric inducers of this type exhibited high enantioselectivities in the Pd-mediated allylic substitution of (E)-1,3-diphenylallyl ethyl carbonate with CH2(CO2Me)2 (up to 98% ee) and (CH2)4NH (up to 92% ee). Ee values of up to 86% and 73% were obtained in the Pd-catalyzed allylic alkylation of cinnamyl acetate with ethyl 2-oxocyclohexane-1-carboxylate and ethyl 2-oxocyclopentane-1-carboxylate, respectively. The effects of the structural modules, such as the nature of the phosphorus-containing ring or exocyclic substituent, on the catalytic activity and enantioselectivity were investigated.

Substitution (logic)

Substitution reaction

10.1039/d0dt00741b

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Citations (7)

Isotopic engineering of `zero-matrix' samarium hexaboride: results of high-resolution powder diffraction and X-ray single-crystal diffractometry studies

Journal of Applied Crystallography (1991)

V. A. Trunov A. L. Malyshev D. Chernyshov А. И. Курбаков M. M. Korsukova

Single crystals of the isotopic `zero-matrix' samarium hexaboride (152Sm154Sm11B6) have been prepared by a modified variant of the high-temperature solution growth method. The crystals were studied by high-resolution powder (HRP) neutron diffraction and X-ray single-crystal diffractometry. The occurrence of vacancies at the boron site and complete occupancy of the metal site was established from structure refinements. The results obtained demonstrate that the use of the `zero-matrix' effect provides considerably increased precision in determining the structural parameters of atoms in hexaborides when studied by neutron diffraction.

Matrix (chemical analysis)

Crystal (programming language)

Powder Diffraction

10.1107/s0021889891001620

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Citations (10)

Crystal structure of 2-(4-methylphenyl)-2-oxo-1-(phenyliodonio)-1-(triphenylarsonio)ethanid tetrafluoroborate solved from X-ray powder data

Zeitschrift für Kristallographie - Crystalline Materials (2013)

Andrei V. Mironov Владимир В. Чернышев E. D. Matveeva Tatyana A. Podrugina Vera A. Alferova

Abstract The crystal structure of 2-(4-methylphenyl)-2-oxo-1-(phenyliodonio)-1-(triphenylarsonio)ethanid tetrafluoroborate, C 33 H 27 AsIO+BF 4 – , was solved and refined from laboratory X-ray powder diffraction data in combination with a DFT calculation (Co K α1 , a =24.427(2) Å, b = 13.3412(18) Å, c =22.399(2) Å, β = 119.49(2)°, S.G. C2/c , R p / R wp = 0.030/0.039). The main features of the C 33 H 27 AsIO+BF 4 – structure are similar to those reported previously for arsenium and phosphorous organic compounds. The distinctive features are short I … O and I … F (2.743(19) and 2.916(17) Å, respectively) intermolecular contacts, also observed previously in the same type of compound, refined from single crystal data.

Tetrafluoroborate

Powder Diffraction

Crystal (programming language)

10.1524/zkri.2013.1566

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Citations (2)

Very compact, water-cooled SiPM module for PET/MRT applications

European Microelectronics and Packaging Conference (2015)

Rainer Dohle Thomas Rittweg Владимир В. Чернышев E. Beyer Jorg Gosler

We present the technology for very compact hybrid circuits with one water cooled LTCC substrate, Silicon Photomultipliers and ASICs for Positron Emission Tomography / Magnetic Resonance Tomography Applications. The SiPM modules with an area of 32.8 by 32.0 mm2 contain 12×12 SiPMs in a pitch of 2.5 mm2. The readout of the 144 channels is done by four highly specialized ASICs. The water cooling channels inside the 11 layer LTCC substrate with 2.1 mm thickness provide cooling for the ASICs, the SiPMs, and thermal insulation between ASICs and SiPMs and allow a very compact design of the detector modules. The 12 SiPM arrays with a 2×6 geometry are wire bonded only at the edges of the SiPMs to the LTCC, enabling the use of nearly the whole detector area for detecting photons. At the opposite side of the substrate four ASICs for the readout electronic with 272 μm bump pitch are flip-chip bonded to the LTCC substrate and underfilled and a few SMD components are mounted. Substrates and all components are MRT compatible. It could be shown, that a completely sufficient cooling with room temperature water is possible. A reduced time to thermal stability of the detector module (10 seconds) compared to air cooling (130 seconds) and water cooled copper pipes at the backside of the ASICs (44 seconds) could be shown.

Silicon Photomultiplier

Application-specific integrated circuit

Source

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Citations (5)

4-(4′-Dimethylaminostyryl)pyridineN-oxide from powder data

Acta Crystallographica Section E Structure Reports Online (2003)

Svetlana N. Ivashevskaja Л. А. Алешина В. П. Андреев Yakov P. Nizhnik Владимир В. Чернышев

The crystal structure of 4-(4-dimethylaminophenylethenyl)pyridine N-oxide, C15H16N2O, has been determined from X-ray laboratory powder diffraction data. The powder pattern was indexed with a monoclinic unit cell with a long a axis. The structure was solved by a grid search technique. The subsequent bond-restrained Rietveld refinement gave bond lengths and angles within expected ranges.

Monoclinic crystal system

Powder Diffraction

Rietveld Refinement

Pyridine-N-oxide

10.1107/s1600536803012340

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Citations (6)

CCDC 1937441: Experimental Crystal Structure Determination

The Cambridge Structural Database (2020)

Л. М. Горностаев O. I. Fominykh T. A. Rukovets Tatyana I. Lavrikova Yu. G. Khalyavina

10.5517/ccdc.csd.cc23123c

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Citations (0)

Application of mixed phosphorus/sulfur ligands based on terpenoids to Pd-catalyzed asymmetric allylic substitution and Rh-catalyzed hydrogenation

Organic & Biomolecular Chemistry (2024)

Konstantin N. Gavrilov Ilya V. Chuchelkin Vladislav K. Gavrilov Ilya D. Firsin Valeria M. Trunina

A small library of easily prepared diamidophosphite-sulfides based on 1,3-thioether alcohols, primarily of terpenoid nature, was developed. Upon complexation with Pd(II) ions, these hemilabile ligands showed the ability to form both

Substitution (logic)

10.1039/d4ob00840e

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Apparatus for automatically measuring and recording the rapidly-changing capacity and loss-angle tangent in an electrolytic cell

Measurement Techniques (1971)

N. E. Markova В. Н. Лебедев Владимир В. Чернышев G. I. Galkin

Bridge (graph theory)

Dissipation factor

10.1007/bf00997889

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CCDC 993000: Experimental Crystal Structure Determination

The Cambridge Structural Database (2014)

Ashot V. Arzumanyan Роман А. Новиков Alexander O. Terent’ev М.М. Platonov V. G. Lakhtin

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/cc12b98z

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