A5019647516- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Crystal Structures and Properties
- Crystallography and molecular interactions
- Geological and Geochemical Analysis
- Radioactive element chemistry and processing
- Metal complexes synthesis and properties
- Solid-state spectroscopy and crystallography
- Nuclear materials and radiation effects
- Mineralogy and Gemology Studies
- Magnetism in coordination complexes
- Clay minerals and soil interactions
- Chemical Synthesis and Characterization
- Layered Double Hydroxides Synthesis and Applications
- Lanthanide and Transition Metal Complexes
- Inorganic Chemistry and Materials
- Advanced Condensed Matter Physics
- Inorganic Fluorides and Related Compounds
- Magnesium Oxide Properties and Applications
- High-pressure geophysics and materials
- Catalytic Cross-Coupling Reactions
- Crystal structures of chemical compounds
- Metal-Organic Frameworks: Synthesis and Applications
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Organic Light-Emitting Diodes Research
St Petersburg University
2015-2024
Russian Academy of Sciences
2019-2024
Institute of Volcanology and Seismology
2023-2024
Czech Academy of Sciences, Institute of Geology
2019-2024
MIREA - Russian Technological University
2023
Institute of Geology of Ore Deposits Petrography Mineralogy and Geochemistry
2019
Research Institute "Pulsar" (Russia)
2019
Herzen University
2015
National University of Science and Technology
2013
Inspection of the X-ray structures newly prepared trans-[MII (CNXyl)2 (DAPT)2 ]Cl(BF4 ) (M=Pd, Pt; Xyl=2,6-Me2 C6 H3 ; DAPT=4,6-diaminopyrimidine-2(1H)-thione) complexes and appropriate Hirshfeld molecular surface analysis allowed recognition previously unknown π-hole⋅⋅⋅metal interactions between a ligated isocyano group (acting as π-hole donor) positively charged d8 -PtII -PdII metal centers nucleophiles); this is first identification with triple-bond species. Results DFT calculations...
Abstract Microporous materials containing hydrated silanol groups Si–OH as well proton complexes, H 2 n +1 O + , including hydronium ( = 1), Zundel 2), and Eigen 4) cations, are of practical importance potential ion exchangers conductors. In this paper, we provide data on crystal‐chemical features, hydrogen bonding Raman spectra alkaline microporous titano‐, niobo‐, zircono‐, aluminosilicate minerals belonging to the labuntsovite, lovozerite, eudialyte, sodalite in which a part sodium was...
Abstract The new eudialyte-group mineral amableite-(Ce), ideally Na 15 [(Ce 1.5 )Mn 3 ]Mn 2 Zr □Si[Si 24 O 69 (OH) ](OH) ⋅H O, was discovered in a peralkaline pegmatite at Saint-Amable Sill, Montérégie, Québec, Canada. associated minerals are albite, microcline, aegirine, serandite, natrolite, yofortierite, and an unidentified titanosilicate forming minute grains. Amableite-(Ce) occurs as yellow equant or thick tabular crystals up to mm across. observed crystal forms {0001}; the subordinate...
The coupling of cis-[PdCl2(CNXyl)2] (Xyl = 2,6-Me2C6H3) with 4-phenylthiazol-2-amine in molar ratio 2:3 at RT CH2Cl2 leads to binuclear (diaminocarbene)PdII complex 3c. was characterized by HRESI+-MS, 1H NMR spectroscopy, and its structure elucidated single-crystal XRD. Inspection the XRD data for 3c three relevant earlier obtained thiazole/thiadiazole derived diaminocarbene complexes (3a EYOVIZ; 3b: EYOWAS; 3d: EYOVOF) suggests that structures all these species exhibit intra-/intermolecular...
Iridium(<sc>iii</sc>) cross-linking catalysts for silicones show a unique temperature-curing profile and lead to thermally resistant luminescent silicone rubbers.
A novel gold(<sc>i</sc>) complex based on an aminotriazole N-heterocylic carbene ligand represents a promising scaffold for the design of anticancer bioorganometallics.
The crystal structure of dmisteinbergite has been determined using crystals from the type locality in Kopeisk city, Chelyabinsk area, Southern Urals, Russia. mineral is trigonal, with following structure: P312, a = 5.1123(2), c 14.7420(7) Å, V 333.67(3) Å3, R1 0.045, for 762 unique observed reflections. most intense bands Raman spectra at 327s, 439s, 892s, and 912s cm −1 correspond to different types tetrahedral stretching vibrations: Si–O, Al–O, O–Si–O, O–Al–O. weak 487w, 503w, 801w cm−1...
CF<sub>3</sub>-enones react with arenes in TfOH to give<italic>trans</italic>-1,3-diaryl-1-CF<sub>3</sub>indanes.
An effective and operationally simple method for the preparation of 1-(2-(sulfonamido)vinyl)indoles (SAV-indoles) by Rh(II)-catalyzed reaction 2,2-diaryl-2H-azirines with 1-sulfonyl-1,2,3-triazoles has been developed. This enables stereoselective synthesis a variety 1,2,3-trisubstituted indoles having Z configuration (1-aryl-2-(sulfonamido)vinyl) substituent. The mechanism, supported DFT calculations, involves formation 1,4-diazahexa-1,3,5-trienes, which rapidly cyclize to...
The fungus, Alternaria sonchi is considered to be a potential agent for the biocontrol of perennial sowthistle (Sonchus arvensis). A new chlorinated xanthone, methyl 8-hydroxy-3-methyl-4-chloro-9-oxo-9H-xanthene-1-carboxylate (1) and benzophenone derivative, 5-chloromoniliphenone (2), were isolated together with eleven structurally related compounds (3-13) from solid culture which used production bioherbicidal inoculum A. sonchi. Their structures determined by spectroscopic (mostly NMR MS)...
The crystal-chemical behavior of two layered titanosilicate minerals with porous crystal structures: kupletskite, K2NaMn72+Ti2(Si4O12)2O2(OH)4F, and kupletskite-(Cs), Cs2NaMn72+Ti2(Si4O12)2O2(OH)4F, was investigated under high-temperature conditions using single-crystal powder X-ray diffraction; infrared, optical absorption Mössbauer spectroscopy electron-microprobe analysis. Both undergo topotactic transformation to dehydroxylated oxidized (HT) modifications at temperature above 500 °C...
Abstract Two crystals of Mg, Al-disordered quintinite-2 H (Q1 and Q2), [Mg 4 Al 2 (OH) 12 ](CO 3 )(H O) , from the Kovdor alkaline massif, Kola peninsula, Russia, have been characterized chemically structurally. Both hexagonal symmetry, P 6 / mcm a = 3.0455(10)/3.0446(9), c 15.125(7)/15.178(5) Å, V 121.49(8)/121.84(6) Å . The structures two solved by direct methods refined to R 1 0.046 0.035 on basis 76 82 unique observed reflections for Q1 Q2, respectively. Diffraction patterns obtained...
Abstract The crystal structure of quintinite-2 H -3 c , [Mg 4 Al 2 (OH) 12 ](CO 3 )(H O) from the Kovdor alkaline massif, Kola peninsula, Russia, was solved by direct methods and refined to an agreement index ( R 1 ) 0.055 for 484 unique reflections with | F o ≥ 4σ . mineral is rhombohedral, 32, a = 5.2745(7), 45.36(1) Å. diffraction pattern has strong sharp Bragg having h – k n l lines weak superstructure extended parallel * centred at h–k ≠ contains six layers within unit cell layer...
Abstract Quintinite-1 M , [Mg 4 Al 2 (OH) 12 ](CO 3 )(H O) is the first monoclinic representative of both synthetic and natural layered double hydroxides (LDHs) based on octahedrally coordinated di- trivalent metal cations. It occurs in hydrothermal veins Kovdor alkaline massif, Kola peninsula, Russia. The structure was solved by direct methods refined to R 1 = 0.031 basis 304 unique reflections. monoclinic, space group C 2/ m a 5.266(2), b 9.114(2), c 7.766(3) Å, β 103.17(3)°, V 362.9(2) Å...
Reaction of the palladium(II) and platinum(II) isocyanide complexes cis-[MCl2(CNR)2] [M = Pd, R C6H3(2,6-Me2) (Xyl), 2-Cl-6-MeC6H3, cyclohexyl (Cy), t-Bu, C(Me)2CH2(Me)3 (1,1,3,3-tetramethylbuth-1-yl abbreviated as tmbu); M Pt, Xyl, Cy, tmbu] with N,N′-diphenylguanidine (DPG) leads to DPG-derived metal-bound deprotonated acyclic diaminocarbene (ADC) species. This reaction occurs via a two-step process, involving initial coupling guanidine one isocyanides leading monocarbene monochelated...
Reactions of (di-)bromo-substituted CF<sub>3</sub>-allyl alcohols with/without arenes with TfOH lead to CF<sub>3</sub>-alkenes or CF<sub>3</sub>-indenes.
Two new natural 10-membered macrolides (1, 2) and one chromene-4,5-dione derivative (3), named stagonolides J K stagochromene A, respectively, were isolated from the phytopathogenic fungus Stagonospora cirsii S-47, together with two known compounds, stagonolide A (4) herbarumin I (5). Stagonolides characterized as (5E,7R*,8S*,9R*)-7,8-dihydroxy-9-propyl-5-nonen-9-olide, (5E,7R,9S)-7-hydroxy-9-propyl-5-nonen-9-olide, (2R*,3R*)-3-hydroxy-2-propyltetrahydro-2H-chromene-4,5(3H,4aH)-dione, by...
Ammoniovoltaite, (NH4)2Fe2+5Fe3+3Al(SO4)12(H2O)18, is a complex hydrated sulphate of the voltaite group that has been recently discovered on surface Severo-Kambalny geothermal field (Kamchatka, Russia). Vibrational spectroscopy applied for characterization mineral. Both infrared and Raman spectra ammoniovoltaite are characterized by an abundance bands, which corresponds to diversity structural fragments variations their local symmetry. The spectrum similar other voltaite-related compounds....