| 1. |
- Baryshnikov, G. V., et al.
(författare)
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Application of Bader's atoms in molecules theory to the description of coordination bonds in the complex compounds of Ca2+ and Mg2+ with methylidene rhodanine and its anion
- 2012
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Ingår i: Russian journal of general chemistry. - 1070-3632 .- 1608-3350. ; 82:7, s. 1254-1262
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Tidskriftsartikel (refereegranskat)abstract
- In the framework of Bader's atoms in molecules theory a complete analysis of the distribution function of electron density in molecules of complexes of Ca2+ and Mg2+ with methylidene rhodanine and its anion was carried out. The role of mutual polarization of the metal cation and the ligand in the formation of coordination bonds was demonstrated. The accumulation of electron density in the interatomic space of coordination bonds is assumed to be a consequence of the deformation of the ligand electron shell under the influence of the cation electric field. Based on the magnitude and sign of the Laplacian and the electron energy density at the critical points of coordination bonds the interactions were classified the in terms of the atoms in molecules theory. The energy of the coordination bonds was evaluated using the Espinoza's formula. The stability of metal-containing rings was considered basing on the values of the bond ellipticity.
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| 2. |
- Belyaev, A. N., et al.
(författare)
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Redox properties of rhodium(III) oxo-bridged carboxylate complexes
- 2001
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Ingår i: Russian journal of general chemistry. - 1070-3632 .- 1608-3350. ; 71:8, s. 1186-1193
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Tidskriftsartikel (refereegranskat)abstract
- Chemical and electrochemical oxidation of rhodium (III) oxo-bridged carboxylate complexes was studied. The chemical [with O-3 and Ce(IV) salts] or electrochemical (at potentials of 1.00-1.20 V) oxidations of the binuclear complexes [Rh-2(mu-O)(mu-O2CCH3)(2)(H2O)(6)](2+) and [Rh-2(mu-O)(mu-O2CCF3)(2)(H2O)(6)](2+) leads to the superoxo complexes [Rh-2(mu-O)(O-2(-))(mu-O2CCH3)(2)(H2O)(5)]+ and [Rh-2(mu-O)(O-2(-))(mu-O2CCF3)(2)(H2O)(5)](+) with terminal coordination of O-2(-). The trinuclcar acetate [Rh-3(mu(3)-O)(mu-O2CCH3)(6)(H2O)(3)](+), unlike its trifluoroacetate analog [Rh-3(mu(3)-O)(mu-O2CCF3)(6)(H2O)(3)](+), is oxidized only electrochemically at a potential of 1.38 V. The oxidation of [Rh-3(mu(3)-O)(mu-O2CCH3)(6)(H2O)(3)](+) is reversible and involves formation of an unstable superoxo group O-2(-) between two Rh-3(III)(mu(3)-O) cores.
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| 3. |
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| 5. |
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| 6. |
- Bhat, M. A., et al.
(författare)
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Synthesis, Anti-inflammatory, and Neuroprotective Activity of N-Substituted Phthalimide Derivatives
- 2023
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Ingår i: Russian journal of general chemistry. - : Pleiades Publishing Ltd. - 1070-3632 .- 1608-3350. ; 93:11, s. 2935-2940
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Tidskriftsartikel (refereegranskat)abstract
- A new series of N-substituted phthalimide compounds was synthesized in good yield. All the compounds were characterized by spectroscopic data and were evaluated for their inhibitory activity against the expression of cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS) and pro-inflammatory proteins in the bacterial lipopolysaccharide (LPS)-induced murine macrophage (RAW 264.7) cells. All the compounds significantly (p <0.05) downregulated the LPS-stimulated COX-2 and iNOS expression from 100% to the ranges of 61.9±5.1–84.5±4.1% and 41.1±5.4–85.3±1.9%) at 10 µM, respectively. Among others, 4-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)-N′-[(3,4-dichlorophenyl)methylidene]benzohydrazide displayed the most potent inhibition to the level of (41.1±5.4%) iNOS expression, about half of the potency of dexamethasone (23.0±3.3%). Moreover, the neuroprotective activity of the compounds was assessed against the 6-hydroxydopamine (6-OHDA)-challenged neuroblastoma SH-ST5Y cells, and all compounds exhibited significant (p <0.05) protection with variable potencies. 4-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl)-N′-[(3,4-dihydroxyphenyl)methylidene]benzohydrazide was found to display more than 70% relative neuroprotection against 6-OHDA-induced cell death with the additional advantage of keeping the highest cell viability index (83.3±4.5%) to the cells.
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| 7. |
- Fisher, AI, et al.
(författare)
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The first example of cobalt(III) mu-oxoacetate with water molecules in apical positions
- 2008
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Ingår i: Russian journal of general chemistry. - New York : Maik Nauka/Interperiodica. - 1070-3632 .- 1608-3350. ; 78:11, s. 2006-2012
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Tidskriftsartikel (refereegranskat)abstract
- Oxidation of Co(MeCOO)(2)center dot 4H(2)O with ozone in acetic acid followed by the treatment with nitric acid results in the formation of the trinuclear oxo-centered acetate complex [Co(III) (3)(mu(3)-O)(mu-O(2)CMe)(6)(OH(2))(3)] NO(3)center dot MeCOOH ([I]NO(3)center dot MeCOOH). Reasons of a decrease in the idealized symmetry of molecular structure (D (3h) -> D (3)) of the complex cation [I](+) were analyzed by means of quantum-chemical calculations. The complex does not retain its structure in solutions (in water, methanol, and ethanol).
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| 8. |
- Golyakov, A. M., et al.
(författare)
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Electrochemical and spectral properties of the polymer form of Cu(II) complex with N,N '-bis(salicylidene)-1,3-propylenediamine
- 2013
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Ingår i: Russian journal of general chemistry. - 1070-3632 .- 1608-3350. ; 83:3, s. 423-429
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Tidskriftsartikel (refereegranskat)abstract
- A conductive polymer based on the Cu(II) complex with N,N'-bis(salicylidene)-1,3-propylenediamine was obtained electrochemically. The optimal mode of the synthesis of the polymer under potentiostatic conditions was found. We determined the charge diffusion coefficient and activation barrier and elucidated the nature of the limiting step of the charge transfer in the polymer bulk in the electrolyte medium. The azomethine base, Cu(II) complex, and its polymer form in the oxidized and reduced states were characterized by X-ray photoelectron spectroscopy and electron absorption spectroscopy.
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| 9. |
- Kononova, S V, et al.
(författare)
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Phase-inversion gradient-porous films on the basis of polyamidoimides derived from phthalimidobenzenedicarbonyl dichloride and various diamines
- 2010
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Ingår i: Russian journal of general chemistry. - : SpringerLink. - 1070-3632 .- 1608-3350. ; 80:10, s. 1977-1985
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Tidskriftsartikel (refereegranskat)abstract
- Morphology of microporous films prepared from aromatic polyamidoimides under different molding conditions was studied by scanning, transmission, and atomic force microscopy with the specific attention given to the nanosize skin layer. The films were manufactured by the phase inversion molding of aromatic polyamidoimides which were synthesized by low-temperature polycondensation of phthalimidobenzenedicarbonyl dichloride with various diamines. Comparison of the parameters of films, including their wettability and X-ray photoelectron spectroscopy data, gave additional information on factors affecting the mechanism of formation of microporous membranes in the system polymer (polyamidoimide)-solvent (N-methylpyrrolidin-2-one)-non-solvent (water).
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