Russian Journal of General Chemistry

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Influence of the structure of the macroheterocyclic ligand on the catalytic properties of metal tetraarenoporphyrazine complexes: III. Oxidative decarboxylation of oxalic acid
Russian Journal of General Chemistry - - 2004
A. B. Korzhenevskii, T. G. Shikova, O. I. Koifman, V. V. Bykova
The catalytic activity of cobalt complexes of a series of tetraarenoporphyrazines in oxidative decarboxylation of oxalic acid under heterogeneous conditions was studied. The structure of the macroheterocycle exerts a significant effect on the catalytic properties of the metal complexes.
New complexes of 3,4-dimethoxyphenylacetic acid with selected transition metal ions: Spectral, thermal, and magnetic properties
Russian Journal of General Chemistry - Tập 87 - Trang 2045-2055 - 2017
W. Ferenc, D. Osypiuk, B. Cristóvão, J. Sarzyński, H. Głuchowska
3,4-Dimethoxyphenylacetates of Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) of general formula M(C10H11O4)2·nH2O, where n = 1, 2 or 4 depending on M(II) ions, are obtained. The complexes crystallize in monoclinic or triclinic systems. The carboxylate groups act as bidentate chelating or bridging ligands. On heating in the air (293–1173 K) they decompose in three steps finally forming oxides of the c...... hiện toàn bộ
Synthesis and characterization of some novel 7-(aryl)-3-phenyl-6-(1H-tetrazol-5-yl)-5H-thiazolo[3,2-a]pyrimidin-5-one derivatives
Russian Journal of General Chemistry - Tập 87 - Trang 1618-1620 - 2017
N. M. Khalifa, M. A. Al-Omar, A. E. Amr
A series of novel tetrazole derivatives containing fused thiazolo[3,2-a]pyrimidines were synthesized in a one-pot three-component reaction of 7-(aryl)-5-oxo-3-phenyl-5H-thiazolo[3,2-a]pyrimidine-6-carbonitriles with sodium azide and ammonium chloride.
Theoretical approaches to prediction of polymer properties
Russian Journal of General Chemistry - Tập 81 - Trang 268-276 - 2011
S. I. Kuchanov
A brief introduction to statistical theory of polymers was provided in a popular manner, with emphasis on quantitative description of polymer liquids. This is essential in view of fact that (1) samples of synthetic polymers differ fundamentally from those of low-molecular-weight compounds by normally several orders of magnitude higher molecular weights and that (2) polymer products represent a set...... hiện toàn bộ
13-halo derivatives of ent-kauranoic acid. Synthesis and structure
Russian Journal of General Chemistry - Tập 81 - Trang 927-930 - 2011
R. N. Khaibullin, M. G. Kurochkina, I. Yu. Strobykina, A. B. Dobrynin, V. E. Kataev
The ent-kauranoic acid 13-chloro-, bromo- and iodo-derivatives were synthesized in quantitative yield. Their molecular structure was established by the X-ray diffraction analysis.
Synthesis and Luminescent Properties of Lu2O2SO4 : Eu3+ Spherical Particles
Russian Journal of General Chemistry - Tập 93 - Trang 2071-2075 - 2023
K. A. Larionova, Yu. G. Denisenko, S. A. Osseni, O. V. Andreev, I. A. Razumkova
Potential use of Lu2O2SO4:xEu3+ as a contrast agent in multifunctional medical imaging was studied. Powders of Lu2O2SO4 : xEu3+ (x = 1–7 mol %) solid solutions consisting of spherical particles with a diameter of approximately 300 nm were synthesized by co-precipitation followed by calcination. The duration of synthesis influences the particle morsphology: increase in the coprecipitation duration ...... hiện toàn bộ
Thermodynamic properties of silicate glasses and melts: VII. System MgO-B2O3-SiO2
Russian Journal of General Chemistry - Tập 80 - Trang 2405-2413 - 2011
V. L. Stolyarova, S. I. Lopatin, S. M. Shugurov, A. L. Shilov
Processes of evaporation and thermodynamic properties of glasses and melts of the system MgO-B2O3-SiO2 in the range of 1550–1800 K were studied for the first time by high-temperature mass-spectrometry. The resulting activities and Gibbs energies of components and also corresponding excess values point to negative deviations from ideal behavior and to the absence of immiscibility fields in glasses ...... hiện toàn bộ
Quantum-chemical simulation of the synthesis of structural fragments of humic substances analogs
Russian Journal of General Chemistry - Tập 84 - Trang 848-852 - 2014
M. A. Poshelyuzhnaya, V. A. Litvin, R. L. Galagan, B. F. Minaev
Semiempirical calculations by the PM3 method were used to optimize the structural fragments of the precursors of synthetic humic and fulvic acids. Changes in the thermodynamic parameters (enthalpy of formation, entropy, and Gibbs energy) were determined and a conclusion was drowm if the postulated processes are thermodynamically possible.
Alkylation of 4-(phenylthio)-1H-pyrazol-5-ols with methyl bromoacetate
Russian Journal of General Chemistry - Tập 87 - Trang 231-238 - 2017
R. N. Vydzhak, S. Ya. Panchishin, V. S. Brovarets
Alkylation of 4-(phenylthio)-1H-pyrazol-5-ols with methyl bromoacetate has afforded a series of phenyl pyrazolyl sulfides which have been oxidized into sulfones. The resulting esters have been hydrolyzed into the corresponding acids. The synthesized compounds potentially exhibit biological activity.
Electrochemical synthesis of copper(II) benzoate
Russian Journal of General Chemistry - Tập 78 - Trang 2166-2166 - 2008
V. I. Zelenov, I. V. Shabanova, M. N. Tsokur
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