Sergey I. Levchenkov

Russian Academy of Sciences | RAS · Southern Scientific Center

The magnetic properties of a dinuclear copper(II) complex of the Schiff base ligand bis(N,N′-3-formylsalicylidene)-1,3-diaminopropan-2-ol (H3L) with an exogenous acetate bridging group, [Cu2L(CH3COO)] (2), and the product of its crystallization from dimethyl sulfoxide (DMSO) solution, [Cu2L(CH3COO)(DMSO)] (3), are studied experimentally and theoret...

The binuclear copper(II) complex [Cu2L(CH3COO)] (I), where L3− is the azomethine trianion based on 3-methyl-4-formyl-1-phenylpyrazol-5-one and 1,3-diaminopropan-2-ol, and its DMSO adduct (II) in which the DMSO molecule acts as an additional bridging ligand are synthesized. The structure of complex II is determined by X-ray diffraction analysis, and...

The product of 3-formyl-2-quinolone condensation with trimethylammonium chloride acethydrazide, (H2L+)Сl– hydrazone, was synthesized. Complexes of Zn(II) and Cu(II), [M(HL)OCH3]ClO4, with a distorted square-planar strucrure of coordination sites and asymmetric chelate сomplexes of Mn(II), Ni(II), and Co(II), [M(HL)(H2L)]·(ClO4)3, of pseudo-octahedr...

Синтезирован гидразон (H 2 L + )Сl - - продукт конденсации 3-формил-2-хинолона с ацетогидразидом триметиламмонийхлорида. На его основе получены комплексы с искаженным плоскоквадратным координационным окружением Zn(II) и Cu(II) состава [M(HL)OCH 3 ]ClO 4 и несимметричные металлохелаты Mn(II), Ni(II), Co(II) с псевдо-октаэдрическим строением координа...

New azomethine 1-(2-hydroxybenzylidenamino)benzimidazolinone-2 and Cu(II), Co(II) and Zn(II) complexes based on it are synthesized and studied. The structure of azomethine and metal complexes is found from the data of elemental analysis, infrared (IR) spectroscopy, 1H NMR spectroscopy, X-ray absorption spectroscopy, and magnetochemistry. It is show...

The data based on the X-ray diffraction analysis results obtained within the recent 20 years about the coordination modes of aroyl(acyl)hydrazones of aldehydes and ketones containing chelatophoric groups of atoms and their photoluminescence and magnetic properties and biological activity are reviewed and generalized. The most significant earlier st...

Copper(II) coordination compounds with the condensation product of the diacetylmonoxime and 2-hydrazino-4,6-dimethylpirimidine (H 2 L) with composition [Сu(Н 2 L)Br 2 ]·Н 2 О ( I ) and [Сu(Н 2 L)Cl 2 ] ( II ) were synthesized. Molecular structures of the compounds were established with...

Refluxing of equimolar amounts of 2,2'-bipyridine (bipy) and N, N, S-tridentate basic form of the Schiff base N-[2-[[3-methyl-1-phenyl-5-thioxo-pyrazole-4-ylidenemethyl]amino]phenyl]-4-methylbenzenesulfonamide (H2L) with corresponding metal acetate hydrate (Cu, Ni, Zn, Cd) in acetonitrile-methanol solution (1:1) give rise to the formation of mononu...

The aminomethylene derivatives of pyrazole-5-one (6) and pyrazole-5-thione (7) were synthesized in the reaction of 2-aminophenol (4) with corresponding 1-phenyl-3-methyl-5-X-pyrazole-4-carbaldehyde (1, X = hydroxy) or (2, X= sulfanyl). Reaction of 2-aminobenzenethiol (5) with 1-R-3-methyl-5-sulfanyl-pyrazole-4-carbaldehydes (2, R = phenyl and 3, R...

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 solution has been elucidated from the data of elemental analysis, IR, electronic absorption and NMR (1H, 13C, and 15N NMR including 1H–1H COSY, 1H...

A new hetaryl hydrazone has been obtained via condensation of 2-aminopyridine-3-carbaldehyde with 1-hydrazinophthalazine and its complexing ability with respect to selected metal ions has been studied. Depending on the nature of the metal and the acid residue, complex compounds of various compositions and structures have been formed.

A new Schiff base, the product of 2-N-tosylaminobenzaldehyde and tryptamine condensation, was synthesized and investigated. A physicochemical study and quantum chemical simulation of the azomethinee tautomerism were performed. Its complexes with Zn(II), Cu(II), Ni(II), Co(II), and Fe(III) were synthesized and studied.

Complexes CuL1 ⋅ MeOH (Ia), NiL1 ⋅ MeOH (Ib), CоL1 ⋅ MeOH (Ic), CuL2 (IIa), NiL2 (IIb), and CоL2 (IIc) of the tetradentate azomethine compounds, namely, 4-methyl-N-[2-[(E)-2-[2-[2-[(E)-[2-(p-toluenesulfamino)phenyl]methyleneamino]ethoxy]ethyliminomethyl]phenyl]benzenesulfamide (H2L1) and 4-methyl-N-[2-[(E)-3-[4-[3-[(E)-[2-(p-toluenesulfamino)phenyl...

The novel hetarylhydrazone (H2L) has been synthesized by condensation of 2-hydrazino-4,6-dimethylpyrimidine with 1-phenyl-3-methyl-4-formylpyrazol-5-one and its complexes with CuCl2 and Cu(ClO4)2 have been obtained. The structures of the compounds were studied by means of NMR, IR, ESR spectroscopy, magnetic susceptibility measurements and X-Ray dif...

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. Structure and properties of the prepared compound have been studied by spectral and quantum-chemical methods.

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 properties of the complex are compared with those demonstrated by a number of previously studied compounds based on bis-azomethine derivati...

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 obtained compounds have been studied by means of elemental analysis, IR, ¹H NMR, and UV spectroscopy, X-ray diffraction analysis, quantum-c...

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 restricted types of ligand systems, mainly hydrazones, azomethines, and their analogs, are reviewed. The known published data for the bi- and p...

The structure of a new mononuclear nickel(II) complex with bis-azomethine [Ni(H2L)]⁺ · CH3COO– · H2O, resulting from condensation of 1,3-diaminopropan-2-ol with 2-amino-3-formylpyridine (H3L), was studied by X-ray diffraction (CIF files CCDC nos. 1562927, 1562928). Apart from the mononuclear complex, the reaction gave a minor amount of the trinucle...

The new complex [Cu 2 (H 2 L)Cl 3 ] with axial chloride ions coordination based on 4-methyl-2,6-bis{[2-(4,6-dimethyl-pyrimidin-2-yl)hydrazono]methyl}phenol was obtained and its crystal structure was determined. Magnetic studies revealed the presence of antiferromagnetic exchange interaction of −193 cm ⁻¹ that is extremely high for such type of comp...

A new azomethine compound, 2-{(E)-[2-(4-hydroxybutylamino)benzimidazol-1-yl]iminomethyl}- phenol, and its cobalt(II) and copper(II) complexes were synthesized and characterized by IR, ¹Н NMR, and X-ray photoelectron spectroscopy and quantum-chemical calculations. The crystal and molecular structures of the cobalt complex were established by X-ray d...

1,10-Phenanthroline (Phen) adducts [M(L)Phen] in copper(II), cobalt(II), and zinc(II) chelates based on N,N,O-tridentate tosylamino-functionalized pyrazole-containing Schiff base (H2L), resulting from condensation of 2-tosylaminoaniline with 3-methyl-1-phenyl-4-formylpyrazol-5-ol, were obtained by electrosynthesis. The composition and structure of...

The electrochemical oxidation of a zero-valent metals (copper, cobalt, nickel, zinc, and cadmium) (1–5) in an acetonitrile-methanol solution containing the equimolar amounts of 1,10-phenanthroline (phen) and the N, N, S-tridentate basic form of the Schiff base N-[2-[[3-methyl-1-phenyl-5-thioxo-pyrazole-4-ylidenemethyl]amino]phenyl]-4-methylbenzenes...

Complexes of Cu(II), Ni(II), Co(II) and Fe(II) ions with N-[2-[(hydroxyalkylimino)methyl]phenyl]-4-methylbenzenesulfonamides containing the (CH2)n-spacer of a variable length (n = 2–6) were synthesized by chemical and electrochemical methods. All the compounds were characterized by C, H and N elemental analysis, IR, EPR and X-ray absorption spectro...

A new highly luminescent iridium complex, bis(2-phenylpyridine-N,C2′)[2-(2′-tosylaminophenyl)benzoxazole-N,N′]iridium(III) [Ir(ppy)2(TAPBO)] (TAPBO- 2-(2′-tosylaminophenyl)benzoxazole) has been synthesized and its molecular structure determined using single crystal X-ray diffraction analysis. The Ir(III) complex displayed intense yellow photophosph...

A series of zinc complexes with a bidentate azomethine Schiff base ligands derived from 2-tosylaminobenzaldehyde, 2-hydroxy-, 2-hydroxy-5-methoxybenzaldehydes, 2-hydroxynaphthaldehyde and 3,4-dimethoxyphenylethylamine were synthesized by chemical and electrochemical methods. All compounds were characterized on the basis of C, H, N elemental analysi...

In the course of self-assembly in the systems MX2–nicotinic hydrazide (HN)–pyruvic acid, where М = Co, Ni; X = Сl, CH3COO, complexes of composition: [CoCl(HNРv)(H2O)2], [Co(HNРv)2], [Ni(HIРv)2] have been synthesized. Local atomic structure of the coordination centers was established by the method of X-ray absorption spectroscopy. Thermal stability,...

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 reacts with Cu(II), Ni(II), Zn(II) and Cd(II) ions depending on the metal salt to give complexes of composition ML2 or MHLX, where HL is m...

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-hydrazones of 2,6-diformylphenol. The calculated values were compared between themselves and with the experimental values of the exchange para...

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. 1565772). It is shown that the polymer is formed due to the coordination of the nitrogen atom of the pyrazolone fragment to the copper(II) i...

Novel Cu(II), Co(II), Ni(II), and Zn(II) complexes of 5-methyl-2-phenyl-4-[(4-phenylazo)anilinemethylylidene]- 2,4-dihydro-3H-pyrazole-3-thione and 5-methyl-4-[4-methyl-2-(4-methylphenylazo)anilinemethylylidene]- 2-phenyl-2,4-dihydro-3H-pyrazole-3-thione, i.e. ligands containing the phenylazo group in the ortho and para positions of the aniline fra...

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-ray diffraction. The coordination polyhedron of the copper atom is a square pyramid with the base formed by two oxygen atoms and two nitrogen...

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 crystal XRD (CCDC No. 1518681). The magnetic properties of the complex are studied. A ferromagnetic exchange interaction between copper(II) ions...

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 studied. Complex I is characterized by the exchange interaction of the antiferromagnetic type (2J =–112 cm–1), which is switched to the fe...

The Cu, Ni, and Со complexes based on the following new azomethine compounds containing azobenzene groups in the ortho- or para-positions of the amine fragment are synthesized: 2-allyl-6-[(E)-[4-(E)-phenylazophenyl]iminomethyl]phenol (HL¹), 2-allyl-6-[(E)-[4-methyl-2-[(E)-phenylazo]-p-tolylazo] iminomethyl]phenol (HL²), 5-methoxy-2-[(E)-[4-[(E)-phe...

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 processed by both Fourier and wavelet transforms, enables the determination of local atomic structural parameters and the unambiguous evidence of t...

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 synthetic molecular machines and devices. The basic principles of the design and controlled linear and rotational motion in such molecular s...

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 fragment are carried out (СIF file CCDC 940849). The assumption that the magnetic exchange in the complexes with the anticomplementary carb...

The nitration of 1,3-dimethylpyrrolo[3,2-d]pyrimidine-2,4-diones under different conditions led to the formation of their 6(7)-mono- and 6,7-dinitro derivatives which were reduced to the corresponding amines. The latter reacted with α- and β-dicarbonyl compounds, as well as with ortho-quinones to give a number of new polycyclic heteroaromatic syste...

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 DMSO-adduct (Ia) is determined by X-ray diffraction analysis (CIF file CCDC 1447891). The complexes contain two binuclear fragments bonded...

2-Amino-1-ethylbenzimidazole (L¹) adducts with copper(II), cobalt(II), and zinc(II) chelates of N,N,S tridentate tosylamino-functionalized mercaptopyrazole-containing Schiff base (H2L), resulting from condensation of 2-tosylaminoaniline with 1-phenyl-3-methyl-4-formylpyrazole-5-thiol, with the general formula [ML · L¹] were obtained by electrochemi...

1'-Phthalazinylhydrazone of acetylferrocene (HL) and copper(II) and nickel(II) complexes on its basis [CuL2] and [NiL2] have been synthesized and investigated. The structure of the hydrazine was determined by X-ray diffraction analysis. Quantum-chemical simulation of the tautomerism of the hydrazone was performed.

By the reaction of Cu(II) perchlorate with the condensation product of 1,3-diamino-2-propanol and 4-hydroxy-3-formylcoumarin (H3L) in the presence of sodium azide, a tetranuclear copper(II) complex with the composition [Cu2L(μ2-1,1-N3)]2 (I) was obtained. On crystallization from a pyridine solution, the crystalline adduct [Cu2L(μ2-N3)(py)2] (II) (p...

o-Tosylaminobenzaldehyde dimethylpyrimidyl hydrazone and its copper(II), nickel(II), and zinc(II) complexesare synthesized and studied. According to the X-ray diffraction data, the zinc(II) complex has the structure of a tetragonal pyramid with the N3O donor ligand environment. According to EPR and magnetochemistry data, the copper(II) complex has...

The synthesis of a series of adducts of 2-amino-1-ethylbenzimidazole (L¹) in Cu(II), Co(II), Zn(II) and Ni(II) chelates of the N, N, S tridentate basic form of the tosylamino functionalized pyrazol containing Schiff base N-[2-[[3-methyl-1-phenyl-5-thioxo-pyrazole-4-ylidenemethyl]amino]phenyl]-4-methylbenzenesulfonamide (H2L) with common formula [M(...

A new Schiff base ligand, 4-methyl-N-{2-[(2-methyl-4-oxo-3,4-dihydroquinazolin-3-yl)iminomethyl]-phenyl}benzenesulfonamide (L), and its complexes with transition metals [Cd(L)2], [Zn(L)2], and [CuLOAc] have been synthesized. The structure and electronic properties of the ligand have been studied by quantum chemical methods, and its zinc and cadmium...

Copper, nickel, and cobalt complexes of the N,N,S-tridentate tosylamino-functionalized mercaptopyrazole Schiff base were obtained by an electrochemical method. The structure and composition of the metal chelates were characterized by C, H, N elemental analysis data and IR and ¹H NMR spectroscopy. More data on the structures of the complexes were ob...

A novel Schiff base is synthesized by condensation of 4-methylphenylsulfonyl-2-benzaldehyde and N-aminoquinazoline-4-one. The molecular and crystal structure of the produced compound is determined by the XRD method. It is found that the crystal contains two independent molecules between which a π-stacking interaction occurs.

Copper(II) complexes isolated from the Cu(CH3COO)2–2-(7-bromo-2-oxo-5-phenyl-3H-1,4-benzodiazepin-1-yl)acetohydrazide (Hydr)–salicylaldehyde (HSal)–isopropanol system [Cu2(HydrSal)2(μ-CH3COO)] (I), [Cu(HydrSal)2] (II) (HydrSal (hydrazone)is the condensation product of hydrazide and salicylaldehide) are synthesized and investigated. The complexes ar...

The main types of mechanisms of exchange interactions are considered in the review in the framework of experimental and theoretical analyses. The electronic and geometric factors that exert a determining effect on the magnetic properties of the bi- and tetranuclear complexes of transition metals based on hydrazones and azomethines of 1,3-diaminopro...

The interaction in the GeCl4–nicotinoyl(isonicotinoyl, 2-, or 4-aminobenzoyl) hydrazone of 2-hydroxybenz(2-hydroxy-1-naphth)aldehyde (H2L)–CoCl2–methanol systems has resulted in the formation of [Ge(L·H)2][CoCl4]·nCH3OH complexes with germanium chelates [Ge(L·H)2]²⁺ protonated at the exo chelate nitrogen atom (NPy or NH2) as the cation. The type of...

By self-assembling in the systems MX2–2-(7-bromo-2-oxo-5-phenyl-2,3-dehydro-1Н-1,4-benzdiazepin-1-yl)acetohydrazide (Hydr)–salicyl aldehyde (HSal) (М = Co, Ni, Zn; X = Cl, CH3COO) the complexes of composition [Co(HydrSal)2], [Ni(HydrSal)2], [Zn(HydrHSal)Cl2], [Zn(HydrSal)(CH3COO)(H2O)] have been synthesized. The local atomic structure of the coordi...

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 crystal XRD (CCDC No. 1518681). The magnetic properties of the complex are studied. A ferromagnetic exchange interaction between copper(II) ions...

The chemical and electrochemical syntheses of the zinc (I) and cadmium (II) complexes are carried out on the basis of the tridentate Schiff base (H2L), the condensation product of (2-tosylaminoaniline) N-(2-aminophenyl)-4-methylbenzenesulfunamide with 1-phenyl-3-methyl-4-formylpyrazole-5-thiol. The structures and compositions of the synthesized met...

Chemical and electrochemical syntheses of the zinc(II) and cadmium(II) complexes with the tetradentate Schiff base (H2L), the condensation product of 2-N-tosylaminobenzaldehyde with diaminodipropylamine, are carried out. The structures, compositions, and properties of the synthesized metal complexes are studied by elemental analyses, IR spectroscop...

A square-pyramidal Ni(II) complex (1) with the composition [NiL(HL′)]ClO4·H2O was synthesized in the reaction of nickel(II) perchlorate and 2-[2-(diphenylphosphino)benzylidene]-1-phthalazinylhydrazone (HL). The coordination surrounding the Ni(II) ion consist of a PNN coordinated deprotonated HL ligand and its corresponding oxidation product - phosp...

[Cu(HydrHPv)(H2O)Cl2] complex has been prepared and characterized by elemental analysis, IR spectroscopy, electrical conductivity, and magnetic susceptibility data. Structure of the coordination sphere and exact parameters of nearest surrounding of Cu²⁺ ions have been determined by X-ray absorption spectroscopy.

2,6-Diformyl-4-tert-butylphenol bis-ferrocenoylhydrazone (1, H3L) and binuclear copper(II) complexes on its basis [Cu2(H2L)(OH)] (2), [Cu2(H2L)Cl3]·(3), and [Cu2(H2L)(OH)]·2NO3 (4) have been synthesized and investigated. Tautomerism of bis-hydrazone (1) has been studied.

Ligand system derived from pyrazolone-5 and N-aminoquinazolinone was prepared, its structure was studied. Metal chelates ML2 were prepared by reaction of the obtained ligand with copper(II), nickel(II), and cobalt(II) acetates. The complexes were studied by IR, electronic, and ESR spectroscopy, magnetochemistry, X-ray diffraction. Copper(II) comple...

Tetrazolyl hydrazones of salicylic aldehyde and 2-N-tosylaminobenzaldehyde as well as zinc(II) and copper(II) complexes on their base have been prepared. Quantum-chemical simulation of tautomerism of the hydrazones in vacuum and in the solutions has been performed. IR and NMR spectroscopy and magnetochemistry studies have revealed that the complexe...

Binuclear complexes of Co(II), Сu(II), and Pd(II) with 2-(N-tosylamino)benzal-2’-(hydroxymethyl)aniline are synthesized. The compositions and structures of the ligand and complexes are determined from the data of elemental analysis, IR spectroscopy, 1Н, 13С, and 15N NMR spectroscopy, X-ray absorption spectroscopy, and magnetochemical measurements i...

Polymer copper(II) complexes with 5-bromosalicylaldehyde heptanoylhydrazone (I) and 3,5-dibromosalicylaldehyde acetylhydrazone (II) are synthesized and structurally characterized. In complex I, the formation of the polymer is due to the coordination of the hydrazide nitrogen atom to the copper(II) ion of the adjacent fragment. In complex II, polyme...

The binuclear copper(II) complex based on azomethine, being a condensation product of 2-aminoethanol with 1-phenyl-1,2,3-butanetrione phenylhydrazone, is structurally characterized (CIF file CCDC 1059996). The structure is compared with the structure of an analog containing the axially coordinated pyridine molecule. The influence of the axial coord...

N-(Phenyl)alkylthiosemicarbazones of 3,5-dichloro- and 3,5-diiodosalicylic aldehydes (H2L) and their copper(II) complexes [Cu(HL)(CH3OH)]+(NO3)– have been synthesized. The structure of one of the complexes has been determined by X-ray analysis.

The Dy(III) binuclear complex with N4O-donor 2,6-diformyl-4-tert-butylphenol bis-1'-phthalazinylhydrazone (H3L) of the composition [Dy-2(H2L)(3)](NO3)(3) center dot 3C(2)H(5)OH (CIF file CCDC 1048418) is synthesized and structurally characterized. In the complex cation [Dy-2(H2L)(3)](3+), ligands H2L- form a three-blade helix around the Dy(III) ion...

Copper(II), zinc(II), and cadmium(II) mixed-ligand complexes [M(L)(L1)], (M = Cu (I), Cd (III)), [Zn(L)(L1)(H2O)] (II) and [Cd(L)(L2)] (IV)) on the basis of N-(2-{[1-phenyl-3-methyl-5-oxo-1,5-dihydro-4H-pyrazol-4-ylidene)methyl]amino}phenyl)-4-methylbenzenesulfonamide (H2L), 2-amino-1-ethylbenzimidazole (L1), and 2-aminopyrazine (L2) were prepared...

Biacetyl monooxime ferrocenoylhydrazone has been synthesized and studied by 1H NMR, IR, and electronic spectroscopy. The electronic absorption spectrum of the title compound in the UV and visible regions has been found to depend on the solvent polarity and pH. Most favorable structures of the hydrazone in solution and gas phase have been determined...

Novel bis-azomethine, the product of condensation of 2,6-diformyl-4-tert-butylphenol and m-aminocinnamic acid, has been synthesized. The product structure and properties have been investigated by means of 1Н NMR, IR, and electronic spectroscopy as well as quantum-chemical simulation. Potential application of the bis-azomethine as a component of dye...

New copper(II), cobalt(II), and nickel(II) complexes with 1-[4-(phenydiazenyl)phenyldiazenyl]-naphthalen-2-ol and 1-[4-methyl-2-(4-methylphenyldiazenyl)phenyldiazenyl]naphthalen-2-ol have been synthesized by chemical and electrochemical methods and characterized by IR, 1H NMR, and X-ray absorption spectroscopy, as well as by magnetochemistry and qu...

The copper(II) complexes [CuL1(NO3)] center dot CH3OH and [(CuLCl)-C-2] center dot CH3OH (L-1 is 3,5-di-tert-butylsalicylal 1'-phthalazinyl hydrazone, and L-2 is 2-N-tosylaminobenzal 2-imidazolinyl hydrazone) forming hydrogen-bonded dimers in a crystal were synthesized. A weak antiferromagnetic exchange interaction transmitted through extensive lin...

New 2-(tosylamino)benzaldehyde bishydrazones and their complexes with copper(II) and zinc(II) have been synthesized. Structure and properties of the prepared compounds have been studied by means of IR and 1H NMR spectroscopy as well as magnetochemistry. Quantum-chemical simulation of the relative stability of tautomeric forms of the bishydrazones h...

The review considers the theoretical foundations and some recent results of investigations of the specific class of magnetically active materials: molecular magnets (single-molecule magnets) and molecular magnets with the linear chain structure (single-chain magnets). Possibilities and promising approaches to controlling their magnetic properties a...