54 Result(s)
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Article
Interrelation Between the Spiropyran-Merocyanine Isomerism and the Metal Coordination in 3d Metal Complexes of a Functionalized Spiropyran of the 2-Oxaindane Series
Possible isomers of the N-(3,4-dimethylphenyl)-2-[(7-hydroxy-3′,3′-dimethyl-3′H-spiro[chromene-2,1′-isobenzofuran]-8-yl)methylidine]hydrazinocarbothioamide (HL) spiropyran of the 2-oxaindane series and the [ML(H2
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Article
Unsymmetrical Structure of the Co(III) Complex with Bisheteroarylhydrazone as Hydrazone and Quinolone Tautomers Stabilized by Hydrogen Bond
Bisheteroarylhydrazone (H2L), the product of 2-hydrazinoquinoline condensation with diacetyl, and mononuclear Co(III) complex [Co(HL)2]Br·2DMSO (I) based on this ligand were synthesized. The structure of the chel...
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Article
Coordination Chemistry and Magnetic Properties of Bi- and Polynuclear Exchange-Coupled Cu(II) and Ni(II) Metal Oximates
This review is an attempt to describe the potential of magnetochemical approach for describing the structure and properties of bi- and polynuclear metal chelates based on coordination compounds with a limited ...
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Article
Copper(II) and Cobalt(II) Carboxylates Containing the 1,3,4-Oxadiazole Fragment: Structures and Properties
Complexes [Сu2L4(MeOH)2] (I) and [СoL2] (II) are synthesized by the reactions of copper(II) and cobalt(II) acetates with 3-[5-p-tolyl)-1,3,4-oxadiazol-2-yl]acrylic acid (HL). The crystal structure of complex I is...
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Article
Synthesis and Crystal Structure of Cobalt(III) Chelate with Tridentate Azomethine Ligand Containing a Benzimidazole Moiety
Azomethine HL was synthesized by the reaction of o-aminophenol with 2-acetylbenzimidazole and used to prepare the cobalt(III) complex [CoL2]2(ClO4)2⋅3H2O (I). The structure of complex I was established by NMR spe...
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Article
Two-Variable Predictive Model of the Antiradical Activity of Hydroxybenzoic Acids in Media with Physiological pH
A regression–classification algorithm to screen natural hydroxybenzoic acids for antiradical activity in media with physiological pH was proposed. The algorithm is based on a combination of descriptor–activity...
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Article
Predictive Model of the Relationship of the Antiradical Activity and the Ionization Potential of Molecules and Ions of Flavonoids
A relationship between the antiradical activity of flavonoids and the molecular descriptors related to the mechanism of their antiradical action was determined by single-variable linear regression analysis in ...
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Article
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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Article
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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Article
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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Article
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 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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Article
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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Article
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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Article
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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Article
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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Article
Structure of the Planar Acetate-Bridged Binuclear Copper(II) Complex Based on 1,3-Bis(3-Formyl-5-tert-Butylsalicylidenimino)propanol-2
The X-ray diffraction and magnetochemical studies of the acetate-bridged binuclear copper(II) complex with 1,3-bis(3-formyl-5-tert-butylsalicylidenimino)propanol-2 with a nearly planar structure of the exchange f...
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Article
Tetranuclear copper(II) complex with the µ4-1,6-hexadicarboxylate linker: crystal structure and magnetic properties
Tetranuclear copper(II) complex [Cu4L2(OOC(CH2)6COO)] (I) based on bis(azomethine), condensation product of 1-phenyl-3-methyl-4-formylpyrazolone-5 with 1,3-diaminopropanol-2, is synthesized. The structure of its ...
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Article
On the structure of copper(II) coordination compounds with L-histidine
Quantum chemical calculations are performed for the spatial and electron structure of complex compounds of L-histidine and its ionized forms with copper(II) for a variety of compositions within the density fun...
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Article
New copper(II) coordination compounds with 1,3-bis(5-(pyridin-2-yl)-1,2,4-triazol-3-yl)propane
Two new copper(II) complexes with 1,3-bis(5-(pyridin-2-yl)-1,2,4-triazol-3-yl)propane (H2L), [Cu2(HL)Cl3] · H2O (I) and [Cu(H2L)](ClO4)2 (II), were described. The compounds were characterized by elemental analysi...
