scholarly journals MIXED COMPLEX COMPOUNDS OF PALMITATE, OLEATE CALCIUM WITH ACETAMIDE, NICOTINAMIDE AND THIOCARBAMIDE

2020 ◽  
Vol 2020 (3) ◽  
pp. 44-49
Keyword(s):  
Ir Spectroscopy ◽  
Coordination Compounds ◽  
Central Atom ◽  
Free Ligand ◽  
Complex Compounds ◽  
Mixed Complex ◽  
Individual Crystal ◽  
Mixed Coordination ◽  
Diffraction Patterns ◽  
Calcium Oleate

The purpose of the study was the synthesis and study of the structure of mixed complexes of palmitate, calcium oleate with acetamide, nicotinamide and thiocarbamide. The mixed coordination compounds of palmitate and calcium oleate were synthesized. The composition, individuality, thermal behavior, methods of coordinating the palmitate and oleate fragments, acetamide, nicotinamide and thiocarbamide molecules have been established. Comparison of the diffraction patterns of calcium palmitate and oleate, free ligand molecules and synthesized compounds showed the mismatch of the diffractograms, conseqently that the synthesized complexes have an individual crystal lattice different from the starting materials. The method of coordination of amide molecules, the environment of the central ion, are proved by IR spectroscopy. Acetamide molecules are coordinated with the central atom through an oxygen atom, thiocarbamide and nicotinamide

scholarly journals THE SYNTHESIS OF TRIAZOLE CONTAINING ANALOGUES OF SALEN AND VANEN

2017 ◽  
pp. 37-39
Author(s):  
Y. Bibik ◽  
D. Khomenko ◽  
R. Doroschuk ◽  
R. Lampeka
Keyword(s):  
Ir Spectroscopy ◽  
Transition Metal ◽  
Metal Ions ◽  
Electronic Properties ◽  
Coordination Compounds ◽  
Binuclear Complex ◽  
Heterogeneous Catalysts ◽  
Complex Compounds ◽  
Coordination Behavior ◽  
Antiviral Activities

Facile methods of the preparation of heterocyclic analogues of Salen and Vanen are reported. The azamethine fragments of Schiff bases were replaced by 1,2,4-triazoles. The method of synthesis described may afford to prepare the series of ligand systems with different substituents with high overall yields relatively to the hydrazide. Unlike Schiff's bases, all synthesized compounds are chemically stable and resistant to oxidizing and reducing agents. The molecules are entirely conjugate to the π-systems, which is likely to be reflected in the electronic properties of coordination compounds. Obtained ligand systems could maintain great interest in the synthesis of various transition metal coordination compounds. These could be concluded from the fact that coordination behavior of synthesized ligands is expected to be similar to that is observed for Salen an Vanen type ligands respectively. The resulting compounds have the same donor centers from Salen and Vanen, having a similar planar structure and coordination behavior. All ligands are tetradentate, may leave vacant positions in the coordination sphere of transition metals and form five- and six-membered cycles. The Vanen analogues are capable of forming binuclear complex compounds, since they have internal N2O2 (for coordination with 3d metal ions) and external O2O2 (for exo-coordination of ions of lantanides) donor centers. The compounds obtained are capable of forming coordination compounds with antibacterial, antifungal, anticancer, antioxidant, anti-inflammatory, antimalarial, antiviral activities and also as homogeneous and heterogeneous catalysts in polymerization, epoxidation, hydrosilylation reactions, sensors etc. The analogues were analyzed by NMR and IR spectroscopy.

scholarly journals New coordination compounds of uranyl ion with 3-(2-hydroxyphenyl)-1,2,4-triazole and its derivatives: synthesis and investigation of spectral properties

2015 ◽  
Vol 3 (2) ◽  
pp. 109-114 ◽  
Author(s):  
Oleksandr Vashchenko ◽  
Dmytro Khomenko ◽  
Roman Doroschuk ◽  
Rostyslav Lampeka
Keyword(s):  
Ir Spectroscopy ◽  
Coordination Compounds ◽  
Spectral Properties ◽  
Complex Compounds ◽  
Uranyl Ion ◽  
New Methods ◽  
Coordination Compounds Of Uranyl

New methods of 3-(2-hydroxyphenyl)-1,2,4-triazoles synthesis were developed. Obtained ligands was used for synthesis of three new complex compounds of uranyl-ion with general composition [UO2(HL)2(Solv)]. These compounds were characterized by NMR and IR spectroscopy.

scholarly journals SYNTHESIS, STRUCTURE AND PROPERTIES OF COMPLEX COMPOUNDSOF COBALT (II) WITH BENZOXASINE DERIVATIVES

2020 ◽  
Vol 1 (30(57)) ◽  
pp. 75-78
Author(s):  
Medina Humaidovna Shamsutdinova ◽  
Nur-Magomed Rezvanovich Tashligov ◽  
Yunus Yakubovich Kurbanov
Keyword(s):  
Ir Spectroscopy ◽  
Coordination Compounds ◽  
Chemical Method ◽  
Complex Compounds ◽  
Spectroscopy Data ◽  
Structure And Properties ◽  
Composition Structure ◽  
Work Coordination ◽  
Derivatives Of ◽  
Azomethine Fragment

In this work, coordination compounds of Co (II) with derivatives of dihydro-4H-3,1-benzoxazines were synthesized by a chemical method and their composition, structure, and physicochemical properties were studied. ... According to the data of elemental analysis and analysis for metal, the obtained complex compounds have the composition ML2, where M is metal, L are ligands: 2- [2-hydroxyphenyl] -4,4-diphenyl-1,2-dihydro-4H-3,1benzoxazine (L1), 2- [2-hydroxy-5-nitrophenyl] -4,4-diphenyl-1 , 2-dihydro-4H-3,1-benzoxazine (L2), 2- [2hydroxynaphthyl] -4,4-diphenyl-1,2-dihydro-4H-3,1-benzoxazine (L3), 2- [ 2-hydroxynaphthyl] -4,4-diethyl-1,2dihydro-4H-3,1-benzoxazine (L4). The structure and properties of the obtained complex compounds were studied by IR spectroscopy. According to IR spectroscopy data, it was found that in all complex compounds, the ligand participates in the open azomethine form; coordination with the metal atom involves two oxygen atoms and a nitrogen atom of the azomethine fragment of the ligand. It was found that the ligand in the complex performs a tridentate chelate-bridging function. The structure of complex compounds of cobalt with derivatives of benzoxazines is proposed.

Coordination Compounds of Indium. Part XIX. Ligand Exchange Studies with Indium(III) Complexes of Trifluoromethyl-β-diketonates

1972 ◽  
Vol 50 (24) ◽  
pp. 3950-3957 ◽  
Author(s):  
Mrs. G. M. Tanner ◽  
D. G. Tuck ◽  
E. J. Wells
Keyword(s):  
Ligand Exchange ◽  
Coordination Compounds ◽  
Free Ligand ◽  
Intramolecular Proton Transfer ◽  
Zero Order ◽  
Monodentate Ligand ◽  
Ligand Exchange Reaction ◽  
First Order ◽  
Stereochemical Properties ◽  
Coalescence Temperature

The ligand exchange reaction between InL3 con plexes (L = CF3•CO•CH•CO•R− anion; R = methyl, i-butyl, phenyl, 2-naphthyl, and 2-thienyl) and excess free ligand (HL) has been studied in the solvents diisopropyl ketone, acetonitrile, benzene, and dimethylsulfoxide. Studies of the lifetimes of the reactants as obtained from their 19F n.m.r. line-widths show that the exchange is first order in InL3 concentration, but zero order in free ligand concentration. The coalescence temperature for the collapse of the n.m.r. 19F chemical shift between free and complexed ligand (~50 Hz) yields ΔG≠ for the exchange. The results are in agreement with the known stereochemical properties of indium(III) complexes. The rate-controlling process in the exchange is identified as the. rotation of one monodentate ligand about a partial double bond prior to intramolecular proton transfer to a second monodentate ligand.

scholarly journals COMPLEX COMPOUNDS OF LANTANOIDS WITH 4 - [(2,4-DIMETOXYBENZYL) AMINO] BENZOIC ACID.

2021 ◽  
Vol 2 (68) ◽  
pp. 57-60
Author(s):  
M. Shamsutdinova ◽  
F. Dzhebirkhanova
Keyword(s):  
Thermal Stability ◽  
Benzoic Acid ◽  
Coordination Compounds ◽  
Metal Ion ◽  
Earth Metal ◽  
Complex Compounds ◽  
Carboxyl Group ◽  
Mercury Lamp ◽  
Infrared Absorption Spectra ◽  
Amino Benzoic Acid

The synthesis of complex compounds of 4 - [(2,4-dimethoxybenzyl) amino] benzoic acid (HL) with ions of samarium (III), europium (III), terbium (III), gadolinium (III) and dysprosium (III). According to the data of elemental analysis and thermogravimetry, the obtained complexes are hydrates of the composition LnL3 · nH2O, where n = 0-2. The area of their thermal stability is in the range from 100 ° С to 150 ° С. Electronic and infrared absorption spectra of the ligand and complexes with rare-earth metal ions have been measured. According to the IR spectra, the coordination of the ligand with the metal ion occurs at the carboxyl group. The carboxyl group is bidentate coordinated. To excite luminescence, a line of a mercury lamp with a wavelength of 248 nm was used. The highest luminescence intensity is observed for the coordination compounds Eu3 +, Tb3 +, Sm3 +, and Dy3 +.

scholarly journals Parameters of adsorption of methylene blue on the magnetite-flask composite surface

2018 ◽  
pp. 10-15 ◽  
Author(s):  
Gul'narkhan Kurmangazhi ◽  
Sagdat Tazhibayeva ◽  
Kuanyshbek Musabekov ◽  
B. Zhakipbayev
Keyword(s):  
Methylene Blue ◽  
Ir Spectroscopy ◽  
Ir Spectrum ◽  
Adsorption Parameters ◽  
Composite Surface ◽  
X Ray ◽  
Peak Intensity ◽  
Magnetite Particles ◽  
Diffraction Patterns ◽  
Good Agreement

Magnetite and magnetite-flask composites were synthesized by the Elmore method. The inclusion of magnetite particles into the structure of the flask is justified by methods of IR spectroscopy and X-ray phase analysis. On the IR spectrum of the composite the peaks characteristic of Fe-O of the magnetite were found at the oscillation frequency of 1402 cm-1. Comparison of diffraction patterns of the flask, magnetite and composite showed the appearance on the diffraction pattern of the system magnetite-silica maxima at values of 2θ and the 37.15, 43.37 characteristic of Fe3O4. In addition, the decrease of peak intensity was found at the values of 2θ 21,48 and 26.56 assigned to the silicate groups. Adsorption of methylene blue on the surface of the flask, magnetite and their composite was studied. Adsorption results were processed according to Langmuir and Freindlich. It is shown that the maximum adsorption values of the dye on the surface of the flask, magnetite, and their composite are 133.3 mg/g, 85.0 mg/g, and 166.6 mg/g, respectively. The adsorption constant is also maximal in the case of a magnetite-flask composite. The adsorption parameters calculated according to Langmuir and Freindlich are in good agreement and indicate the preferability of using the flask and composite magnetite- flask as a methylene blue adsorbents.

scholarly journals Crystal Structures, Hirshfeld Surfaces, and Thermal Study of Isostructural Polymeric Ladders of La(III) and Sm(III) Coordination Compounds with 4,4’-Bipyridine and Dibromoacetates

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4274
Author(s):  
Agnieszka Czylkowska ◽  
Anna Pietrzak ◽  
Małgorzata Szczesio ◽  
Bartłomiej Rogalewicz ◽  
Jakub Wojciechowski
Keyword(s):  
Crystal Structures ◽  
Coordination Compounds ◽  
Central Atom ◽  
Thermal Study ◽  
Hirshfeld Surface ◽  
Mixed Ligand ◽  
Enrichment Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hirshfeld Surfaces

Two novel mixed ligand complexes with general formula [M2(4,4′-bpy)1.5(CBr2HCOO)6(H2O)2]n (where 4,4′-bpy = 4,4′-bipyridine) were synthesized. Thermal analysis was used to describe a solid intermediate and final products of thermolysis. A coupled TG-MS system was used to monitor principal volatile fragments evolved during pyrolysis. Crystal structures of the complexes were determined. Cationic dinuclear M2 (M(III) = La, Sm) coordination cores were obtained. Both crystal structures are isostructural. Single crystal X-ray diffraction analysis revealed that investigated structures of 1D coordination polymers assembled in ladder-like systems. The central atom replacement resulted in unit cell identity parameter П = 0.0091. Additionally, the isostructurality of the reported La(III) and Sm(III) complexes was revealed using Hirshfeld Surface analysis supported by Enrichment Ratio calculations.

New Iron(II) Complexes [Fe(HC(Pz)3)2]A2 with Spin-Crossover

2015 ◽  
Vol 233-234 ◽  
pp. 534-537 ◽  
Author(s):  
Оlga G. Shakirova ◽  
Natalia V. Kuratieva ◽  
Evgeny V. Korotaev ◽  
Ludmila G. Lavrenova
Keyword(s):  
Magnetic Susceptibility ◽  
High Temperature ◽  
Ir Spectroscopy ◽  
Structure Analysis ◽  
Coordination Compounds ◽  
Spin Crossover ◽  
Color Change ◽  
Static Magnetic Susceptibility ◽  
X Ray ◽  
Magnetochemical Study

Three new coordination compounds of iron (II), [Fe (HC(Pz)3)2](C8H5O4)2.C8H6O4(I), [Fe (HC(Pz)3)2](C10H7SO3)2.2H2O (II) and Fe (HC(Pz)3)2](C12H25SO4)2(III), where HC(Pz)3is the tridentate chelatortris(pyrazol-1-yl) methane, have been synthesized and investigated by X-ray structure analysis, electronic and IR spectroscopy, static magnetic susceptibility method. The magnetochemical study of complexes I–III in the interval from 300 to 500 K showed that they possessed the high-temperature spin crossover1A1↔5T2accompanied by thermochromism (the pink ↔ white color change).

Structure of Tl(18-crown-6){Cl3CC(O)N P(O)(OCH3)2}: Coordination of the Ionic Multidentate Weakens the Interaction of the Metal Atom with the Crown Ether

1999 ◽  
Vol 54 (4) ◽  
pp. 451-455 ◽  
Author(s):  
Victor A. Trush ◽  
Konstantin V. Domasevitch ◽  
Vladimir M. Amirkhanov ◽  
Joachim Sieler
Keyword(s):  
Ir Spectroscopy ◽  
Crown Ether ◽  
Metal Atom ◽  
Central Atom ◽  
Carbonyl Groups ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
The Mean ◽  
Oxygen Atoms

The thallium(I) dimethyl-N-trichloroacetylamidophosphate complex with a 18-crown-6 of the composition Tl(18-crown-6){L} (L = {Cl3CC(O)NP(O)(OCH3)2} -) has been prepared and characterized by means of IR spectroscopy and X-ray diffraction (orthorhombic, space group P212121 with a = 8.660( 1), b = 11.557(2), c =26.296(3) Å, Z = 4, V = 2631.8(6) Å3; R1 = 0.0285 and wR2 = 0.0558 for 4314 unique reflections). It was shown that (L-) is coordinated to the central atom in a bidentate manner via oxygen atoms of phosphoryl [Tl-O(l) 2.678(4) Å] and carbonyl groups [Tl-O(2) 3.012(6) Å.The Tl( 18-crown-6)+ moiety adopts a typical “sunrise” coordination with the metal atom laying 1.134(2) Å above the mean plane of the oxygen atoms of the macrocycle. This deviation is the highest value of the structurally examined Tl( 18- crown-6 )+ complexes. The Tl-O (etheric) separations are in the range 2.913(4) - 3.198(5) Å (av. 3.030(6) Å).

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