Phosphorylthioformic acid morpholides can be successfully used as a precursor in the synthesis of complexes of phosphoryl-substituted thiohydrazides with hydrazine and morpholine. The reaction of sterically hindered phosphorylthioformic acid morpholides with hydrazine hydrate proceeds chemoselectively with the formation of hydrazono(morpholino)methylphosphodiamides.

Hydrogels filled with CaHPO4 · 2H2O and Ca8(HPO4)2(PO4)4 · 5H2O were synthesized from the acrylate derivatives of poly(ethylene glycol) by the photopolymerization method. The swelling behaviour of the filled and unfilled hydrogels in water was studied. The solubility of the photoinitiator in water and in the monomers was estimated.

Dehalogenation of[1,2-Ph2-3,3-(PPh3)2-3-Cl-closo/pseudocloso-3,1,2-RuC2B9H9]− affords, in addition to the unusual “symbiotic”** cluster [(1,2-Ph2-pseudocloso-3,1,2-RuC2B9H9) (1′,8′-Ph2-closo-2′,1′8′-RuC2B9H9)], a trace amount of a triple cluster species [(1,2-Ph2-pseudocloso-3,1,2-RuC2B9H9)(1′,8′-Ph2-closo-2′,1′,8′-RuC2B9H9)(1″,8″-Ph2-closo-2″,1″,8″-RuC2B9H9)], comprising three (Ph2RuC2B9H9) units

A comprehensive study of lithium-conducting polymer electrolytes based on polyethylene glycol 1500 and lithium salts (LiSCN and LiN(CF3SO2)2) was carried out using thermogravimetry, differential thermal analysis, electrometry, and vibrational spectroscopy. Their phase composition was refined, structural changes resulting from varying the concentration of lithium salts were determined, the most probable

Characteristics of thermal transformations of oligomeric silazanes with organoelement substituents at the N atoms (M-OESs) containing one element M = Y, Zr, or Hf or a pair of elements, viz., Zr and Y or Hf and Y, in air in the temperature range 200–1500 °C were investigated. The introduction of yttrium into zirconium- or hafnium-containing oligosilazanes results in an increase in the mass loss at

Ruthenium(ii) and (iii) carborane complexes containing XantPhos as a ligand were synthesized for the first time. It was shown that the reaction of the known complex exo-5,6,10-[Cl(Ph3P)2Ru]-5,6,10-(µ-H)3-10-H-nido-7,8-C2B9H8 with a 10% molar excess of XantPhos in benzene at 80 °C leads to a new closo-ruthenacarborane 3-Cl-3,3-[x2-XantPhos]-closo-3,1,2-RuC2B9H11, which can be easily converted to the

New carboxylate phosphabetaines were synthesized from 3-(diphenylphosphino)propionic acid and unsaturated amides. Alkylation of the synthesized carboxylate phosphabetaines with haloalkyles was studied. In vitro biological activity of the synthesized phosphonium salts was evaluated.

The reaction of Cd(NO3)2 · 4H2O and Eu(NO3)3 · 6H2O or Tb(NO3)3 · 6H2O with potassium 3,5-di-tert-butylbenzoate (Kbzo) and N-donor ligands (1,10-phenanthroline (phen), 2,4-lutidine (2,4-lut), 3,4-lutidine (3,4-lut), phenanthridine (phtd), 2,3-cyclododecenopyridine (cdpy), acridine (acr)) afforded heterometallic LnCd2 complexes: [EuCd2(bzo)7(EtOH)2(phen)] (2), [LnCd2(bzo)7(2,4-lut)4] (Ln = Eu (3), Tb

Structure-energetic and dynamic characteristics of graphite oxide model segments, as a basic element of which the C54 fragment of a carbon sheet was taken, and their hydration complexes involving a restricted number of water molecules are analyzed. The structure optimization and calculation of normal vibrations were performed at the density functional approximation with the B3LYP hybrid exchange-correlation

Hydroxy-containing ionic liquids such as triethyl(3-hydroxypropyl)ammonium, 1-(3-hydroxypropyl)-3-methylimidazolium, 3-(2-hydroxyethyl)-1-methylimidazolium, and 1-(3-hydroxypropyl)pyridinium chlorides were used as catalysts for the addition of carbon dioxide to epoxides, which gives cyclic carbonates. The effect of CO2 pressure and reaction temperature on the conversion of epoxides, as well as a promoting

Organosoluble polyimides with tetramethyldisiloxane fragments in the main chain were synthesized by one-step high-temperature polycondensation and their properties were studied. Heat resistant polymers (Tg = 195–240 °C, T10% = 420–490 °C) were tested as protective coatings for quartz optical fibers. The new developed coatings have high thermal (72 h at 300 °C) and hydrolytic stability.

The present analytical survey explores different aspects of hydrolytic degradation of drug dosage forms (DF) based on polylactides, homopolymers of lactic acid (PLA) and copolymers of lactic and glycolic acids (PLGA). The study includes various scientific data from multiple sources describing the effect of the PLGA nanocarrier hydrolytic degradation rate on the profile of drug release from the DFs

Controlled polymerization of styrene (both self-initiated and initiated with azobisisobutyronitrile) in the presence of Blatter’s radical at 125 °C was studied. When using the radical initiator, there is no induction period. On the basis of UV spectroscopy and MALDI massspectrometry studies, it was established that the Blatter radical is completely consumed at the initial stage of the polymerization

The study is concerned with structural rearrangements in the crystals of heterospin complexes Cu(hfac)2 with nitroxide radicals LR (hfac is hexafluoroacetylacetonate, LR is 2-(1-R-1H-pyrazol-4-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl, R is Et or Allyl) induced by increasing pressure from 10−4 to ∼1 GPa in the pressure-transmitting medium. An increase in the external pressure

A series of methacrylic acid co(polymers) were obtained using various reversible chain transfer agents. The molecular weight characteristics of the synthesized (co)polymers were determined using gel permeation chromatography. In vitro studies showed the absence of cytotoxicity of the obtained compounds against immune cells (peritoneal macrophages) and the absence of an effect on the functional activity

The para-hydroxymethyl derivatives of 2,6-di-tert-butylphenol, 2,6-diisobornylphenol, 2-isobornyl-6-tert-butylphenol, 2-isobornyl-6-methylphenol, and 2-isobornylphenol were synthesized. A comparative evaluation of the antioxidant properties of the synthesized compounds was carried out in in vitro models. The activity of derivatives is predetermined by the number and bulkiness of the substituents at

The process of phase formation in solutions of polyacrylic acid and cetyltrimethylammonium bromide was studied in microfluidic channels with a characteristic size of 100–200 µm. The system of convection—diffusion—reaction equations was solved to develop an association model in polyelectrolyte—surfactant solutions in a microchannel with the laminar flow of the reactants. The phase formation conditions

Nanocomposite polymer electrolytes based on poly(ethylene glycol) diacrylate and 1 M LiBF4 solution in γ-butyrolactone containing SiO2 nanoparticles were studied by FT IR spectroscopy. Quantum chemical modeling of five different solvate complexes of ions composed of LiBF4 with solvent molecules was carried out and their theoretical IR spectra were calculated. The compositions of the solvate complexes

Ceramic-forming organochromiumoxane yttriumoxane alumoxane oligomers with a given molar ratio of Al: Cr and Al: Y, hydrolytically stable in air, have been synthesized. The materials demonstrate fiber-forming properties. It is established that thermal treatment of the obtained oligomers leads to the formation of high purity, heat-resistant multicomponent ceramics based on aluminum, yttrium and chromium

New metal-organic frameworks [Mn(DMF)2(odabco)2](ClO4)2 · H2O (1), [Mn(H2O)2− (HCOO)2] · odabco (2), and [Mn(Hodabco)2(odabco)3](NO3)4 (3) were synthesized by the reaction of manganese Perchlorate with 1,4-diazabicyclo[2.2.2]octane N,N′-dioxide (odabco) in N, N-dimethylformamide (DMF) under varying reaction conditions. The reaction in N-methylpyrrolidone afforded the metal-organic framework [Mn(odabco)3](NO3)2

A novel design of electroactive components of rechargeable organic batteries based on stable verdazyl radicals bearing various substituents is proposed. 3-Positioned aromatic substituents at the verdazyl moiety affect the reduction potentials and almost do not affect the oxidation potential, while 1-positioned aromatic substituents affect contrariwise the oxidation potential of this radical without

The main advances in the synthesis and studies of the properties of new stable heterocyclic verdazyl radicals and verdazyl radical coordination chemistry are reviewed. The promising applications of these radicals are also discussed.

Indoline spiropyrans containing benzo[f]coumarin moiety annulated to the 2H-pyran cycle were synthesized. The obtained compounds exist in solutions as a tautomeric mixture of their spirocyclic and merocyanine forms. The spiro form exhibits an enhanced resistance to UV irradiation and does not rearranges into the merocyanine isomer in the temperature range of 278–303 K.

A new extraction system based on polyethylene glycol 1500 and NaNO3 was proposed for the recovery of light rare-earth elements (Ce, La, Nd, Pr, and Sm) from aqueous solutions. The equilibrium distribution coefficients and degrees of extraction of CeIII, LaIII, NdIII, PrIII, and SmIII in the proposed aqueous two-phase system were found. The dependences of the quantitative characteristics of rare-earth

The effect of fluorine doping on the transport properties (oxygen-ion and proton conductivity) of perovskite-related complex oxides Ba2In2O5, Ba4In2Zr2O11, and Ba4Ca2Nb2O11 with various concentrations and degrees of disordering of oxygen vacancies was analyzed. Regardless of the doping mechanism and concentrations and degrees of disordering of oxygen vacancies, the introduction of low concentrations

The use of calcium carbide (in the presence of H2O) as a source of acetylene in the reaction with methyl 2-amino-4,6-O-benzylidene-2-deoxy-β-d-glucopyranoside under superbasic conditions (KF, KOH, DMSO, 130 °C, 3 h) led to the corresponding vinyl ether in 78% yield. The vinylation does not affect other reaction centers. Replacement of water with deuterium oxide in the reaction mixture gave a stable

The sorption isotherms of anionic surfactants (AS) from the aqueous solution on eight polar and nonpolar sorbents were obtained. The equilibrium characteristics of sorption were determined. The SV-50 activated carbon is recommended for the effective recovery of AS based on the values of maximum adsorption and concentration equilibrium constants. It has been established that, when the content of AS

Bis(tetraphenylantimony) malonate was synthesized by the reaction of tetraphenylantimony bromide with silver malonate (the molar ratio was 2:1) in toluene. According to the X-ray diffraction data, the tridentate carboxylate ligand is a chelate. The coordination number of the Sb(1) atom involved in a contact with the carbonyl oxygen atom increases to six (Sb(1)—O(1), 2.199(7) Å; Sb(1)—O(3), 2.362(7)

The palladium-catalyzed amination was used to synthesize 2,7-diamino derivatives of naphthalene containing two chiral substituents and fluorophore groups (dansyl, 7-methoxycoumarin, 6,7-dimethoxycoumarin, 6-aminoquinoline). The synthesized compounds were studied by UV absorption and fluorescence spectroscopy in the presence of individual enantiomers of amino alcohols and salts of 21 metals. The possibility

To study the radiolysis of the extractant composition based on solutions of dicyclohexano-18-crown-6 (DCH18C6) in ionic liquids containing the bis(trifluoromethylsulfonyl)imide anion (NTf2−), we synthesized stereoisomeric DCH18C6•Sr(NTf2)2 complexes as a model of the strontium-containing macrocyclic component of this system and studied the mechanism of their destruction in the solid phase. Three main

The review is concerned with studies on peculiar features of supramolecular organization of phthalocyanines (Pc) bearing complex-forming substituents (15-crown-5, 2-oxyphenylphosphonic acid residues) in organized aqueous microheterogeneous media based on cationic and anionic surfactants, bile salts (BS) including sodium deoxycholate (SDC), as well as polyelectrolytes and amphiphilic polymers including

Interaction of vinyl trichlorosilane with sodium salt of ricinoleic acid is investigated. It is established that the composition and structure of silicon-containing ethers depends on the content of crystallization water in sodium ricinoleate, and the concentration and nature of solvent. Thus, in the case of a mixture of absolute alcohol with ether and low content of crystallization water, the reaction

Based on the reference data on the dynamic viscosity of the melts of halides of the elements of Groups 1 and 11, the approximating dependences in the form of cluster-associate and Frenkel’s models were constructed at various temperatures. In the framework of the cluster-associate viscosity model, which is being developed by the authors, entities in the form of virtual clusters and associates determine

Tetrakis(4-bromophenoxy)phthalocyanine and its metal complexes (M = Mg, Co, Cu, Zn) were synthesized. Sulfochlorination of these compounds followed by hydrolysis of the sulfochlorides gave tetrakis(2-sulfo-4-bromophenoxy)phthalocyanine and corresponding sulfonated metallophthalocyanines (except M = Cu). Spectral properties of the compounds synthesized were investigated. It was shown that the introduction

Gadolinium orthoferrite GdFeO3 nanoparticles were synthesized by co-precipitation of gadolinium and iron(m) hydroxides in a free impinging-jets microreactor followed by thermal treatment of co-precipitation products. According to X-ray diffraction, the co-precipitated hydroxides were X-ray amorphous, and the content of key elements within their composition corresponded to the stoichiometry of GdFeO3

The reaction of [Re6Se8(CN)6]4− cluster anions with Ln3+ cations in the presence of thiophene-2,5-dicarboxylate anions in an aqueous solution was studied. Two new framework compounds were synthesized and structurally characterized: [{Yb(H2O)3}2(tdc)-Re6Se8(CN)6]•10H2O (1) and CsK0,5[{Yb4(OH)4(H2O)7,5(NO3)0,5(tdc)2}{Re6Se8(CN)6}]NO3 • 16.5H2O (2) (tdc is the thiophene-2,5-dicarboxylate anion). Compound

The complexation of chitosan and anionic surfactant, sodium dodecyl sulfate (DDS), in aqueous-alcohol media with a variable content of an organic cosolvent (methanol, ethanol, and propan-1-ol) was studied. A complicated effect of the composition of mixed solvents on the binding parameters of DDS by chitosan was observed. The introduction of 10–20 vol.% ethanol and propan-1-ol is accompanied by an increase

The palladium-catalyzed amination was used to synthesize optically active 3,3’-diaminosubstituted biphenyl derivatives (in particular, macrocyclic derivatives) decorated with additional fluorophore groups (dansyl and 7-methoxycoumarin). The synthesized compounds were studied by spectroscopic methods (UV spectroscopy, fluorescence) in the presence of individual enantiomers of amino alcohols and metal

The effect of structures of the derivatives of [2-(diphenylphosphorylmethoxy)phenyl]-diphenylphosphine oxide (L1) on the complexation properties toward rare-earth elements (REE) was studied. A new structural analogue of L1, isopropyl 2-(diphenylphosphorylmethoxy)benzoate (L3), was synthesized. The extraction of REE by the carboxylated podand L3 in a 1,1,7-trihydrododecafluoroheptanol—water system with

Synthesis of arylenebis(2-aminothiophene-3-carbonitriles) by the Gewald reaction was developed. The structures of the synthesized monomers were established by IR and NMR spectroscopy, mass spectrometry, and microanalysis. Polycondensation of these monomers with diacetylferrocene gave azomethine-bridged polythiopheneferrocenes.

New compounds, 2-[4-(2,6-dimethylphenoxy)benzoyl]benzoic acid and its pseudochloride, were synthesized. Pseudochloride was used as the monomer to obtain new polyarylenephthalide, which is of interest for designing the materials with unique electrophysical properties.

Hydrophobic coatings on cellulosic materials were obtained using triethoxy(octyl)silane and its dimer, 1,1,3,3-tetraethoxy-1,3-dioctyldisiloxane, as modifiers. The structures of the modifiers were studied. The efficiency of the use of these modifiers in producing hydrophobic coatings was demonstrated. The maximum contact angle of 135° is achieved with a modifier content not exceeding 8% and with coating

A method has been developed for the obtaining of new oligo(dimethyl)silanes comprising 1,7-bis(methyl)-m-carboranyl units and bearing the terminal chlorosilyl or methoxysilyl groups. Reactions of such oligomers with an excess of benzylmagnesium chloride or 1-chloromagnesiummethyl-m-carborane lead to oligo-m-carboranylenemethylenesilanes containing the terminal benzylsilyl or m-carboranylmethylenesilyl

Alkylation of N-aryl and N-arylalkyl acetamides with hydroxy adamantane derivatives in trifluoroacetic acid was studied. The differentiating effect of trifluoroacetic acid on the regio-selectivity of adamantylation of o-alkyl-substituted acetanilides was established, leading to energetically more stable products of para-substitution with respect to the alkyl group (the content of para-alkyl isomers

The reaction of perfluorinated three-mercury anticrown (o-C6F4Hg)3 (1) with 1,2-dichloroethane (DCE) affords the complex {[(o-C6F4Hg)3]2(ClCH2CH2Cl)}(2) containing two anticrown molecules per DCE molecule. According to the X-ray diffraction data, the DCE molecule in complex 2 acts as a bridge between molecules 1, each DCE chlorine atom being coordinated to a single mercury center of the neighboring

Onium salt, N1, N1, N1, N5, N5, N5-hexaethylpentane-1,5-diammonium dibromide, was used as a catalyst for the addition of CO2 to epoxides. An influence of insoluble supports on the rate of the process as well as possibility of recycling of the catalytic system are described. In addition, the effects of temperature and CO2 pressure on the yields of products are discussed.

Hydride-containing 1,1-(PPh3)2-1-H-3-O(CH2)4-isonido-1,2,4-OsC2B8H9 osmacarborane bearing a charge-compensated ligand was synthesized via a reaction of the deprotonated form of medium non-icosahedral 5,6-nido-C2B8H12 carborane with (PPh3)3OsCl2 in a THF solution. The structure of this complex was assigned using 1H, 11B/11B{1H}, and 31P{1H} NMR spectroscopy.

The reaction of tridentate amidine 2-[Ph2P(O)]C6H4NHC(But)=N(2,6-Me2C6H3) (1) containing the side-chain donor group Ph2P=O with NdCl[N(SiMe3)2]2 (2) in a molar ratio of2:1 afforded the neodymium bis(amidinate) monochloride complex {2-[Ph2P(O)]-C6H4NC(But)N(2,6-Me2C6H3)}2NdCl (3). The neodymium bis(amidinate) monoallyl complex {2-[Ph2P(O)]C6H4NC(But)N(2,6-Me2C6H3)}2Nd(C3H5) (5) was synthesized by the

A method of obtaining multipurpose magnetic chitin, which combines the magnetic properties of magnetite and the adsorption properties of polysaccharide, was proposed. The possibility of using chitin-(CT) and chitosan (CS)-containing magnetic composites for the adsorption of inorganic ions CoII and CrVI and organic substances (2- and 4-nitrophenols) from aqueous media was analyzed. It was shown that

A series of poly(β-amino esters) were synthesized using the Michael addition reaction from 1-(3-aminopropyl)silatrane and glycol diacrylates. The structure of the resulting olygomers was confirmed by means of 1H NMR spectroscopy. Using acetylsalicylic acid as a model drug, the ability of synthesized olygomers to bind carboxyl-containing physiologically active compounds was shown. Synthesized polymers

The nucleophilic ring-opening reaction of tetrahydropyran derivative of the closo-dode-caborate dianion with sodium azide in the presence of tetrabutylammonium bromide led to the novel azido-derivatives of[B12H12]2−. A Cu-catalyzed 1,3-dipolar [3+2] cycloaddition reaction of the closo-dodecaborate dianion azido-derivatives with alkynyl-cholesterol led to 1,4-disubstituted 1,2,3-triazoles with the closo-dodecaborate

The phase diagrams of the liquid systems RnSi(OR’)4−n-Me2CO-H2O and RnSiCl4−n-Me2CO-H2O, where R = Me, Ph; R’ = Me, Et; n = 0–2, were compared. Mathematical modeling of the phase equilibrium in these systems was performed on the basis of the UNIFAC and NRTL equations. The heterogeneous regions, conodes of phase equilibrium, and compositions of the coexisting phases are determined. A satisfactory description

A kinetic model of the development of acute viral infection is proposed and the dynamic behavior of key variables, including the concentrations of viral particles, infected cells, and pathogenic microorganisms, is described. The change in the hydrogen ion concentration in the lungs and pH dependence of the activity of carbonic anhydrase, a key respiration enzyme, are critical factors. An acute bifurcation

Isoquinolines react with secondary phosphine oxides without catalyst (70–75 °C, 10–15 h, without solvent or in MeCN) to chemo- and regioselectively form previously unknown diadducts, 1,3-bis(diorganylphosphoryl)-1,2,3,4-tetrahydroisoquinolines, in high yields (85–95%).

A model compound, as well as linear and cross-linked polymers polyazomethine and polyphenylene, were synthesized based on 1,2-bis(4-acetylbenzyl)-o-carborane. The thermal stability of polymers was investigated. The structure of polymers was studied by X-ray photoelectron spectroscopy (XPS).

Four new metal-organic frameworks were synthesized based on the N-donor ligand 1,5-bis(3,5-dimethylpyrazol-1-yl)-3-selenapentane (L) novel in this field of chemistry: three one-dimensional metal-organic frameworks based on silver(I) cations, [Ag3(L)2(NO3)2]-NO3·MeOH (1), [Ag(L)]NO3 (2), and [Ag(L)(H2O)]NO3 (3), and one three-dimensional metal-organic framework [Zn3(bdc)3(L)]·0.5 MeOH (4, H2bdc is 1

The achievements of polycondensation in supercritical carbon dioxide over the past 20 years are considered. The contribution of the A. N. Nesmeyanov Institute of Organoelement Compounds (Russian Academy of Sciences) to polycondensation in supercritical media was shown using the synthesis of polyimides, polyimidosiloxanes, polyarylates, polyphenylfluorenes, ferrocene-containing polyphenylenes, polyphenylquinoxalines

The exchange reactions of equimolar amounts of potassium penta(benzyl)cyclopentadienide CpBn5K (CpBn5 = C5(CH2Ph)5) and SmI2(THF)2 or YCl3 afforded the corresponding half-sandwich derivatives [CpBn5Sm(DME)(μ-I)]2 (1) and [CpBn5YCl2(THF)]2[KCl(THF)2] (2). According to the X-ray diffraction data, the metal ions in complexes 1 and 2 are coordinated by CpBn5 ligands in a η5-fashion. The difference is that

Oxidation of diethyl disulfide with atmospheric oxygen at 363 К in the presence of 1,3-dimethylimidazolium dimethyl phosphate is described. On the basis of the 1Н, 31Р, and 13С NMR data, it is shown that oxidation of diethyl disulfide results in ethyl sulfonates. Formation of ethyl alcohol, which is a product of a side reaction of ethyl sulfonate hydrolysis, probably, catalyzed by the 1,3-dimethylimidazolium

Methods for the synthesis of ceramic-forming organoelement poly(oligo)mers, metallocarbosilanes and organoelement oxanealuminoxanes, as precursors of components (matrices, coatings, fibers, etc.) for the development of high-temperature, high-strength, and oxidation-resistant nanostructured carbide and oxide ceramic composites are presented.