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New approaches to the functionalization of the 1-carba-closo-decaborate anion
Chemical Communications. 2022. Vol. 58. No. 23. P. 3775-3778.
Shmal’ko A., Cendoya P., Anufriev S., Suponitsky K., Gabel D., Igor B. Sivaev
Two new approaches to the functionalization of the 1-carba-closodecaborate anion [1-CB9H10] at boron atoms via the ring-opening of its 1,4-dioxane derivative with various nucleophiles and Pd-catalysed cross-coupling of its iodo derivative with aromatic amines and heteroaromatics were developed.
Stogniy M., Anufriev S., Shmal’ko A. et al., Dalton Transactions 2021 Vol. 50 No. 7 P. 2671-2688
An unusual reactivity of 9-iodo-nido-carborane [9-I-7,8-C2B9H11]− towards nucleophiles under strong basic conditions was revealed. The nucleophilic substitution of iodine with O- and N-nucleophiles results in [9-RO-7,8-C2B9H11]− (R = H, CH2CH2OMe) and [9-L-7,8-C2B9H11] (L = Py, NEt3, Me2NCH2CH2NMe2), respectively. Reaction of [9-I-7,8-C2B9H11]− with CoCl2 in 1,2-dimethoxyethane in the presence of t-BuOK, depending on the order of addition of the reagents, ...
Added: April 17, 2022
Kalinin M., Medved’ko A., Minyaev M. E. et al., Journal of Organic Chemistry 2023 Vol. 88 No. 11 P. 7272-7280
A new approach to the preparation of N,N′-unsymmetrically substituted 9-aminobispidines through aminal bridge removal reaction has been developed, the principal feature of which is the ability to selectively functionalize all three nitrogen atoms. The intermediates of 1,3-diazaadamantane’s aminal bridge removal reaction are characterized, and the mechanism of this reaction is proposed based on the analysis ...
Added: February 14, 2024
Stogniy M., Erokhina S., Suponitsky K. et al., Dalton Transactions 2021 Vol. 50 No. 14 P. 4967-4975
A number of new nido-carboranyl amidines 10-R(CH2)nNHC(Et)vHN-7,8-C2B9H11 (n = 2, R = OH, OMe, and NMe2; n = 3, R = OH) were synthesized by the nucleophilic addition of amino alcohols and N,N-dimethylethylenediamine to the highly activated –CuN+– triple bond of the 10-propionitrilium derivative of nido-carborane. A similar reaction of 10-EtCuN-7,8-C2B9H11 with ethylenediamine unexpectedly resulted in the cleavage of ...
Added: April 8, 2022
Krasil’nikov V. N., Tyutyunnik A. P., Chulkov E. et al., Journal of Materials Science 2023
In this paper, the results of studying the formation conditions, crystal structure, thermal, spectral, and optical
properties, as well as the electronic band structure of cobalt-doped zinc glycolate Zn1-xCox(OCH2CH2O)
(0˂x≤0.2) are presented. It was established on the basis of X-ray powder diffraction data that the crystal
structure of Zn1-xCox(OCH2CH2O) is derived from the structure of Zn(OCH2CH2O), i.e. it ...
Added: March 29, 2023
Stogniy M., Anufriev S., Bogdanova E. et al., Dalton Transactions 2024 Vol. 53 No. 7 P. 3363-3376
A series of stable iron(II) bis(dicarbollide) derivatives [8,8’-(RNHC(Et)vHN)2-3,3’-Fe(1,2-C2B9H10)2] (R = Pr, R = Ph, (CH2)2OH, (CH2)3OH, (CH2)2NMe2) was prepared starting from FeCl2 or [FeCl2(dppe)] and the corresponding nido-carboranyl amidines [10-RNHC(Et)vHN-7,8-C2B9H11]. In a similar way, the reactions of the oxonium derivatives of nido-carborane with FeCl2 in tetrahydrofuran in the presence of t-BuOK lead to the corresponding stable oxonium derivatives iron(II) ...
Added: February 28, 2024
Igor B. Sivaev, Anufriev S., Shmalko A., Inorganica Chimica Acta 2023 Vol. 547 Article 121339
Based on the data of 1H NMR spectra, the effect of various substituents at boron atoms in different positions of the ortho-carborane cage on its CH-acidity and the electron-withdrawing effect upon substitution at the carbon atom is considered. The introduction of chlorine atoms to the boron atoms opposite to the carbon atoms (positions 9 and 12) slightly reduces ...
Added: January 29, 2023
Vinogradov A., Komarov P., Puntus L. et al., MolBank 2022 Vol. 2022 No. 4 P. 1-7
A new terbium(III) complex with a (3,4-diphenyl)(2-methylthienyl)cyclopentadienyl ligand
was synthesized. Single-crystal X-ray analysis revealed a binuclear biscyclopentadienyl complex
with a [TbCl2K]2 core. Luminescence properties of the terbium complex were analyzed. ...
Added: January 28, 2024
Ananyev I., Друзина А., Косенко И. et al., European Journal of Inorganic Chemistry 2020 Vol. 2020 No. 27 P. 2658-2665
Novel cobalt bis(dicarbollide) terminal alkynes with charge‐compensated group were synthesized by the cleavage reactions of oxonium derivatives of cobalt bis(dicarbollide) with N,N‐dimethylprop‐2‐yn‐1‐amine. The solid‐state molecular structures of alkynes prepared from 1,4‐dioxane and tetrahydropyran derivatives of cobalt and iron bis(dicarbollide) were determined by single‐crystal X‐ray diffraction. A series of zwitterionic conjugates of cobalt/iron bis(dicarbollide) with cholesterol ...
Added: August 11, 2020
Sivaev I., Stogniy M., Bregadze V., Coordination Chemistry Reviews 2021 Vol. 436 Article 213795
Synthesis and structure of transition metal complexes with phosphine ligands derived from icosahedral dicarbaboranes C2B10H12, monocarbaboranes [CB9H10]- and [CB11H12]-, as well as various metallacarboranes are reviewed. Possibilities of practical application of such complexes are discussed. ...
Added: April 8, 2022
Afanasyev O., Kuchuk E., Muratov K. et al., European Journal of Organic Chemistry 2021 Vol. 2021 No. 4 P. 543-586
Tertiary amines represent a key class of organic molecules with multiple industrial, synthetic, and analytical applications. The focus of this review is on different approaches towards the synthesis of the C3 and C3V symmetrical tertiary amines. Generally, symmetrical tertiary amines can be prepared via N‐alkylation with alkyl halides and alcohols, reductive amination, desamination, hydroamination of olefins, and ...
Added: March 29, 2021
Baraboshkin N., Zelenov V., Ivan V. Fedyanin, CrystEngComm 2023 Vol. 25 No. 48 P. 6719-6739
he main objective of this study is to investigate the potential of cinnoline oxides and their nitro derivatives as explosive materials. Thus, the study includes the synthesis, crystal structure prediction, single-crystal X-ray structure determination, crystal packing analysis and calculation of the detonation properties of [1,2,5]oxadiazolo[3,4-c]cinnoline 5-oxide, 1,5-dioxides and their nitro derivatives. It was found that ...
Added: January 18, 2024
Semyonov, D., Slushko G., Stogniy M. et al., Organometallics 2023 Vol. 42 No. 18 P. 2522-2530
Reactions of nickel(II) phosphine complexes [(dppe)NiCl2], [(MePh2P)2NiCl2] and [(Ph3P)2NiCl2] with C-substituted nido-carboranes [7-R-nido-7,8-C2B9H11]− (R = Me, Ph, C(NHCy)2+) were studied. The reactions with [(dppe)NiCl2] lead to the corresponding nickelacarboranes 3,3-(dppe)-1-R-closo-3,1,2-NiC2B9H10 with absent or negligible steric interactions between the ligands. The reactions of [(MePh2P)2NiCl2] with [7-R-nido-7,8-C2B9H11]− (R = H, Me, Ph) result in nickelacarboranes 3,3-(MePh2P)2-1-R-closo-3,1,2-NiC2B9H10 with noticeable steric loading, while the reaction ...
Added: October 25, 2023
Faraonov M., Romanenko N., Mikhailenko M. et al., New Journal of Chemistry 2021 Vol. 45 P. 13599-13607
Reduction of organic dye trans-perinone (its abbreviation is perinone) in different experimental conditions allows us to obtain and characterize radical anion {cryptand(K+)}[perinone˙−] (1) and dianion {PPN+}2[perinone2−]·2C6H4Cl2 (2) salts of this dye. The salts have layered structures. Perinone˙− radical anions form π–π stacked dimers in 1 with an effective interaction between them, whereas perinone2− dianions are ...
Added: October 21, 2022
Astakhov A., Chernenko A., Kutyrev V. et al., Inorganic Chemistry Frontiers 2023 Vol. 10 No. 1 P. 218-239
C-Amino-1,2,4-triazoles are challenging polynitrogen substrates for metal-catalyzed arylation due to their multidentate character, enhanced coordinating ability and decreased nucleophilicity of the amino group. In the present study, the Buchwald–Hartwig cross-coupling of diverse 3(5)-amino-1,2,4-triazoles with aryl chlorides and bromides delivering (hetero)arylamino-1,2,4-triazoles in good-to-excellent yields under Pd/NHC catalysis was developed. The use of Pd complexes with bulky ...
Added: February 14, 2024
Nikolaev S. A., Tsodikov M. V., A. V. Chistyakov et al., Catalysis Today 2021 Vol. 379 P. 50-61
PdCu/Al2O3 (Pd = 0.1 wt.%, Cu = 0.1 wt.%) catalyst and its monometallic analogues (Pd/Al2O3 and Cu/Al2O3) were prepared by combination of deposition-precipitation and impregnation methods. The structure of the catalysts was studied by means of XRD, TEM, EDS, TPD-NH3, and DRIFTS. In a standard run (275 ○C, 5 h), Cu/Al2O3 converts 11 % of ethanol to α-alcohols with ...
Added: November 11, 2023
Svitanko I., Pivina T. S., Khakimov D. V., Journal of Molecular Modeling 2024 Vol. 30 Article 93
Using quantum chemistry and atom–atom potential methods, the molecular and crystal structures of cubane 1 and all types of unsubstituted azacubanes 2–22 were calculated. Alternative possible polymorphs of cubane 1 have been proposed. The thermochemical properties of azacubanes in the gas and solid phases were assessed. Thermodynamic aspects of stability are considered, and a significant ...
Added: March 13, 2024
Shirokova V., Ikonnikova V., Solyev P. et al., Synthesis 2021 Vol. 53 No. 24 P. 4689-4699
Directly accessible 8-substituted tetrahydroquinolines undergo 1,5-hydride shift-triggered cyclization to provide hardly accessible julolidine derivatives in 20-98% yield under scandium (III) triflate catalysis. The scope of the reaction, several follow-up transformations and a remarkable side-process discovered during the conditions optimization are highlighted. ...
Added: July 29, 2021
Андрюшечкин Б. В., Eltsov K., Pavlova T. et al., Journal of Chemical Physics 2018 Vol. 148 No. 24 Article 244702
The adsorption of O-2 on Ag(111) between 300 and 500 K has been studied with temperature-programmed desorption (TPD) and scanning tunneling microscopy (STM). At the first stage of adsorption, the disordered local oxide phase (commonly looking in STM as an array of black spots) is formed on the surface irrespective of the substrate temperature. The maximum concentration of black spots was found to be approximate to 0.11 ML, which corresponds to an oxygen coverage of approximate to 0.66 ML. Taking into account that the nucleation of the Ag(111)-p(4 x 4)-O phase starts after the saturation of the disordered phase, one ...
Added: October 25, 2021
I. V. Sedov, Arutyunov V. S., Tsvetkov M. V. et al., Eurasian Chemico-Technological Journal 2022 Vol. 24 No. 2 P. 157-163
The possibility of using coalbed methane to produce methanol is assessed. Methanol can be obtained from methane both by direct partial oxidation and from synthesis gas formed through the oxidative conversion of methane. Thermodynamic analysis of coalbed methane conversion was carried out to determine the conditions for obtaining synthesis gas with the ratio [H2 ]/[CO] = ...
Added: October 7, 2022
Budkov Y., Kolesnikov A. L., Polymer Science - Series C 2018 Vol. 60 No. Supplement 1 P. 148-159
Theoretical models of the conformational behavior of flexible polymer chains in mixed solvents enunciated in the world literature during the last decade are critically reviewed. Models describing different mechanisms of coil-to-globule transitions in a good solvent induced by cosolvent addition are highlighted. Special attention is given to the analysis of theoretical approaches to describing the ...
Added: November 30, 2018
Yurova P., Малахова В. Р., Gerasimova E. V. et al., Polymers 2021 Vol. 13 No. 15 P. 2513
Low chemical durability of proton exchange membranes is one the main factors limiting their lifetime in fuel cells. Ceria nanoparticles are the most common free radical scavengers. In this work, hybrid membranes based on Nafion-117 membrane and sulfonic or phosphoric acid functionalized ceria synthesized from various precursors were prepared by the in situ method for ...
Added: February 3, 2022
Trifonova E., Ankudinov N., Mikhaylov A. A. et al., Angewandte Chemie - International Edition 2018 Vol. 57 No. 26 P. 7714-7718
The rapid development of enantioselective C−H activation reactions has created a demand for new types of catalysts. Herein, we report the synthesis of a novel planar‐chiral rhodium catalyst [(C5H2tBu2CH2tBu)RhI2]2 in two steps from commercially available [(cod)RhCl]2 and tert‐butylacetylene. Pure enantiomers of the catalyst were obtained through separation of its diastereomeric adducts with natural (S)‐proline. The catalyst promoted enantioselective ...
Added: September 29, 2020
Tatiana L. Kulova, Skundin A., Gavrilin I. M. et al., Batteries 2022 Vol. 8 No. 8 Article 98
Nanostructure composites Ge-Co-P with brutto-composition CoGe2P0.1, or CoGe2@GeP were manufactured via electrolysis of aqueous electrolyte. Such composites are able to reversible insertion of lithium and sodium with specific capacities up to 855 and 425 mAh/g, respectively. The main advantage of the composites consists in their excellent cycleability. ...
Added: November 25, 2022
Wiley, 2022
Nitrogen-Rich Energetic Materials
Provides in-depth and comprehensive knowledge on both the chemistry and practical applications of nitrogen-rich energetic materials
Energetic materials, a class of material with high amounts of stored chemical energy, include explosives, pyrotechnics, and propellants. Initially used for military applications, nitrogen-rich energetic materials have become important in the civil engineering and aerospace sectors, they are ...
Added: January 31, 2023