125 Result(s)
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Article
I. N. Shcherbakov
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Article
Selective Naked-Eye Fluorescein-Based Chemosensor for the Detection of Pd2+ Cations
Highly sensitive and selective chemosensor for the determination of palladium(II) cations based on diphenylphosphino derivative of N-aminofluorescein was synthesized. The Pd2+ ion detection is accompanied by a co...
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Structure, Spectral Properties, and Complexing Ability of 1-Phenyl-3-methylpyrazol-5-one Ferrocenoyl Hydrazone
A potentially tridentate coordinating chelating ligand system, 1-phenyl-3-methylpyrazol-5-one ferrocenoylhydrazone, has been synthesized. Structure of the obtained ligand and its equilibrium forms in the solut...
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Proton Coupled Electron Transfer in the Reaction of Hydroxybenzenes with Hydrazyl Radical in Aqueous Media
Possible electron transfer mechanisms have been studied for the reaction of 2,2′-diphenyl-1-picrylhydrazyl with a number of natural hydroxybenzenes in aqueous buffer solutions at pH = 2–9 using the methods of ...
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Study of Selected Spectral Properties and Complex Formation with Transition Metals Ions of a New Schiff’s Base Containing Fluorescein and Sulfamide Fragments
A new azomethine based on N-aminofluorescein and ortho-tosylaminobenzaldehyde has been synthesized. Structure and properties of the obtained compound have been studied by means of IR, 1H NMR, and electron absorpt...
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Synthesis of Phosphonium Enamines: Physicochemical Properties of Dimethylsulfoxide Solutions
Dimethylsulfoxide solutions of the products of the condensation of formylmethyl(triphenyl)phosphonium chloride with amines of different nature are studied via densitometry, elemental analysis, and IR, 1H NMR, and...
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Synthesis and Selected Properties of Novel Metal Complexes with Bis-Azomethine Based on 7-Hydroxy-4-methyl-8-formylcoumarin and 1,3-Diaminopropan-2-ol
Condensation of 7-hydroxy-4-methyl-8-formylcoumarin with 1,3-diaminopropan-2-ol has afforded a novel bis-azomethine, and its metal chelates with copper(II), nickel(II), and zinc(II) have been obtained. Structu...
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Synthesis, Structure, and Spectral Properties of 3,5-Di-tert-butyl-1,2-benzoquinone 3-Hydroxynaphthoyl Hydrazone and Its Complexes with Zn(II), Cd(II), Ni(II), and Co(II)
Novel complexes of Zn(II), Cd(II), Ni(II), and Co(II) with 3,5-di-tert-butyl-1,2-benzoquinone 3-hyd-roxynaphthoyl hydrazone have been synthesized. Composition, structure, magnetic and spectral properties of the o...
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Controlled Molecular Magnetism of Bi- and Polynuclear Transition Metal Complexes Based on Hydrazones, Azomethines, and Their Analogs
The possibilities of the magnetochemical method for the description of structures and properties of bi- and tetranuclear metallochelates and supramolecular architectures based on coordination compounds with re...
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On the Influence of the Nature of Non-Bridging Donor Atoms on the Structure and Magnetic Properties of Binuclear Cu(II) Complexes with Heterocyclic Azomethine Ligands
Binuclear complex [Cu2L(μ2-pz)] (pz = pyrazolate anion) of copper(II) with the condensation product of 1,3-diamino-2-propanol (DAP) and 4-formyl-3-formylcoumarin (H3L) is synthesized and characterized. Magnetic p...
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Spectrokinetic Studies of the Products of Conversion of Natural Phenols in Radical Reactions
Fourier-transform IR and NMR spectroscopy are used to show that, in the reaction with 2,2'‑diphenyl-1-picrylhydrazyl radical, the secondary products of natural phenol conversion are dimeric compounds formed by...
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Article
Crystal Structure of Two-Dimensional Coordination Polymer {[Cu(dps)2(DMSO)2](ClO4)2}n Derived from 4,4'-Dipyridyl Sulfide
A new complex of general formula {[Cu(dps)2(DMSO)2](ClO4)2}n has been obtained with the aim to study the effect of perchlorate anion on the structure of coordination polymer based on 4,4'-dipyridyl sulfide. It ha...
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Article
Influence of non-bridging donor atoms on the value of exchange interaction in binuclear CuII complexes with bis-hydrazones based on 2,6-diformylphenol
The quantum chemical simulation of exchange interaction according to the broken symmetry approach was performed for a series of binuclear CuII complexes containing the asymmetric exchange moiety based on bis-hydr...
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Article
New Tridentate Schiff Base, Product of Condensation of 4-Methyl-7-hydroxy-8-formylcoumarin and N-Aminomercaptotriazole: Synthesis, Structure, and Complex Formation
A new Schiff base was prepared by the reaction of 4-methyl-7-hydroxy-8-formylcoumarin with N-aminomercaptotriazole. In solution and in solid phase the compound was shown to exist in the thione form. The compound ...
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Transition State Structure and Mechanism of the Reaction of Hydroxybenzenes with N-Centered Radical in Non-Ionizing Media
Experimentaly and theoretically, using the method of density functional theory, the structure of 2,2'-diphenyl-1-picrylhydrazyl radical and the mechanism of its reaction with di- and trihydroxybenzenes in non-...
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Crystal Structure of the Polymer Copper(II) Complex with 1-Phenyl-3-Methyl-4-Formyl-5-Hydroxypyrazole Hetarylhydrazone
A new coordination polymer of Cu(II) based on 1-phenyl-3-methyl-4-formyl-5-hydroxypyrazole 4,6-dimethylpyrimidylhydrazone is synthesized. The polymer is studied by X-ray diffraction analysis (CIF file CCDC no....
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Crystal structure and magnetic properties of a new polymer dinuclear copper(II) chelate with a schiff base based on 3-formylpyrone and 1,3-diaminopropanol-2
A polymeric dinuclear copper(II) complex with a Schiff base based on 3-formyl-4-hydroxy-6-methylpyrone and 1,3-diaminopropanol-2 is synthesized. The crystal structure of the complex is determined by single cry...
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Crystal structure of the (N,N′-bis[chromen-2,4-dione]-3-{2′-hydroxypropylenediamine-N,N′,O,O′}) (dimethylsulfoxide)copper(II) complex
The N,N′-bis[chromen-2,4-dione]-3-{2′-hydroxypropylenediamine-N,N′,O,O′}copper(II) solvate complex with dimethylsulfoxide is synthesized. The crystal and molecular structure of the complex is determined by X-r...
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Local atomic structure of mono- and binuclear metal complexes based on 3-formylpyrone and 3-formylcoumarin bis-azomethines
A series of Cu, Ni, and Mn complexes based on formylpyrone and formylcoumarin azomethynes with 1,3- diaminepropanol-2. The analysis of XANES and EXAFS spectra of the Cu, Ni, and Mn complexes, which were proces...
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Switching of the exchange interaction character in the binuclear copper(II) complexes based on the hetaryl derivatives of 1,3-diaminopropanol-2
The binuclear copper(II) complex with bis-azomethine, viz., the product of condensation of 1,3-diaminopropanol-2 with 4-hydroxy-3-formylcoumarin (H3L), of the composition [Cu2L(μ2-CH3COO)] (I) is synthesized and ...
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Molecular machines as a driving force of progress in modern post-industrial society
The review considers main advances achieved in recent years in a fairly old and simultaneously modern field of research, controlled motion at the molecular level and its practical transformation in the form of...
