M. D. Tugushev, D. D. Strunin, A. A. Dan’shina, Yu. V. Nelyubina, I. A. Nikovskii
{"title":"Simple Catalyst Based on Zinc(II) Iodide for the Synthesis of Cyclic Carbonates","authors":"M. D. Tugushev, D. D. Strunin, A. A. Dan’shina, Yu. V. Nelyubina, I. A. Nikovskii","doi":"10.1134/S1070328425600731","DOIUrl":"10.1134/S1070328425600731","url":null,"abstract":"<p>The reaction of tridentate ligand 2,6-bis(5-(<i>tert-</i>butyl)-1<i>H</i>-pyrazol-3-yl)pyridine (L) and zinc(II) iodide affords a new zinc(II) complex LZnI<sub>2</sub>. The compound is isolated in the individual state and characterized by NMR spectroscopy, and its single crystal LZnI<sub>2</sub>∙2C<sub>3</sub>H<sub>7</sub>NO is characterized by X-ray diffraction (XRD) (CIF file CCDC no. 2447394). The synthesized complex demonstrates a catalytic activity in the reactions of CO<sub>2</sub> with substituted oxiranes with the formation of cyclic carbonates. This is due to the simultaneous presence in the catalyst of the metal Lewis acidic site capable of coordinating epoxide, nitrogen Lewis basic site providing CO<sub>2</sub> fixation, and nucleophilic iodide ion that activates epoxide ring opening. The development of the proposed approach to the design of catalysts will possibly simplify the preparation of efficient systems for the reactions of carbon oxide with three-membered heterocycles.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 8","pages":"732 - 739"},"PeriodicalIF":1.1,"publicationDate":"2025-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145537652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Supramolecular Lanthanide Complexes with Cucurbituril: Luminescence and Logical Devices","authors":"M. I. Rakhmanova, T. S. Sukhikh, E. A. Kovalenko","doi":"10.1134/S1070328425600810","DOIUrl":"10.1134/S1070328425600810","url":null,"abstract":"<p>Complexes [{Dy<sub><i>x</i></sub>Ln<sub>(2 – <i>x</i>)</sub>(H<sub>2</sub>O)<sub>5</sub>(NO<sub>3</sub>)}<sub>2</sub>CB[6]](NO<sub>3</sub>)<sub>4</sub>·HNO<sub>3</sub>·6H<sub>2</sub>O (<i>x</i> = 1, Ln = Eu; <i>x</i> = 0.8, Gd, Ho) (<b>I</b>–<b>III</b>) are synthesized from a mixture of lanthanide nitrates and cucurbit[6]uril (C<sub>36</sub>H<sub>36</sub>N<sub>24</sub>O<sub>16</sub>, CB[6]) in nitric acid on heating to 100°С. According to the X-ray diffraction (XRD) data, in compounds <b>I</b>–<b>III</b> the lanthanide cation coordinates two oxygen atoms of the CB[6] molecule, H<sub>2</sub>O molecules, and nitrate ions. Compounds <b>I</b>–<b>III</b> are characterized by XRD, IR spectroscopy, ICP-OES spectroscopy, and elemental analysis. The coordinates of chromaticity points are determined from the luminescence spectra, and their values are very close to the white light coordinates. This specific feature is a consequence of the presence of two Dy<sup>3+</sup>-centered emission bands with comparable intensities. One of these bands is the hypersensitive transition <sup>4</sup><i>F</i><sub>9/2</sub> → <sup>6</sup><i>H</i><sub>13/2</sub> caused by a relatively high symmetry of the coordination lanthanide environment close to <i>C</i><sub>4<i>v</i></sub>. In addition, a peculiarity of compounds <b>I</b>–<b>III</b> is a strong dependence of the luminescence spectrum on the excitation wavelength. Models of molecular logical devices with a possibility of switching over luminescent signal of irradiation with different wavelengths are proposed on the basis of this phenomenon.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 8","pages":"740 - 748"},"PeriodicalIF":1.1,"publicationDate":"2025-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145537771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. S. Alhussaini, A. A. I. Alyahya, A. A. Al-Ghanayem
{"title":"Antimicrobial Applications of Fe(II) and Fe(III) Schiff Base Complexes: Role of Complexation in Activity Enhancement: A Review (2020–2025)","authors":"M. S. Alhussaini, A. A. I. Alyahya, A. A. Al-Ghanayem","doi":"10.1134/S1070328425600974","DOIUrl":"10.1134/S1070328425600974","url":null,"abstract":"<p>Schiff base ligands and their coordination complexes with transition metals have garnered significant interest in medicinal chemistry due to their diverse biological activities, particularly antimicrobial properties. Among them, Fe(II) and Fe(III) complexes have shown remarkable potential as antimicrobial agents against a broad spectrum of pathogens. This review highlights recent advances (2020 to 2025) in the antimicrobial evaluation of Fe(II) and Fe(III) Schiff base complexes. Key studies reporting improved efficacy against bacterial and fungal strains are examined, with a focus on structural variations of ligands, coordination geometries, and the influence of metal oxidation states on bioactivity. A central theme of this review is the role of complexation in enhancing antimicrobial activity. The process of forming metal–ligand complexes has been shown to improve membrane permeability, increase reactive oxygen species (ROS) generation, and inhibit essential microbial enzymes. Additionally, the electronic and steric properties of the Schiff base framework significantly affect metal chelation and, in turn, biological performance. By correlating molecular design with antimicrobial outcomes, this review offers valuable insights into structure–activity relationships and highlights future directions for developing iron-based metallopharmaceuticals with enhanced therapeutic potential.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 9","pages":"829 - 841"},"PeriodicalIF":1.1,"publicationDate":"2025-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145772113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. V. Sartakova, S. V. Sysoev, A. M. Makarenko, N. V. Kurat’eva, D. P. Pishchur, K. V. Zherikova
{"title":"Scandium(III) 1,1,1-Trifluorohexane-2,4-dionate Complex: Synthesis, Structure, and Thermal Properties","authors":"A. V. Sartakova, S. V. Sysoev, A. M. Makarenko, N. V. Kurat’eva, D. P. Pishchur, K. V. Zherikova","doi":"10.1134/S1070328425600536","DOIUrl":"10.1134/S1070328425600536","url":null,"abstract":"<p>A new scandium(III) 1,1,1-trifluorohexane-2,4-dionate complex [Sc(5Htfac)<sub>3</sub>] was synthesized, purified, and characterized by elemental analysis, NMR spectroscopy, and mass spectrometry. Its structure was determined at 150 K by X-ray diffraction analysis (CCDC no. 2433044). The complex has a molecular structure in which the bidentate cyclic ligands are arranged according to the <i>os</i>-isomer. Shortened H…F interactions were identified in the structure. The thermal properties were studied by TGA and DSC, and the fusion temperature (309.3 ± 0.5 K), enthalpy (Δ<sub>fus</sub><i>H</i>°(<i>T</i><sub>fus</sub>) = 36.0 ± 1.4 kJ mol<sup>–1</sup>), and entropy (Δ<sub>fus</sub><i>S</i>°(<i>T</i><sub>fus</sub>) = 116.5 ± 4.5 J mol<sup>–1</sup> K<sup>–1</sup>) were determined. The temperature dependence of the saturated vapor pressure was measured by the flow method (343–433 K) and the static method with a membrane null manometer (410–470 K). On this basis, the thermodynamic characteristics of vaporization at average and standard temperatures were calculated (Δ<sub>vap</sub><i>H</i>°(298.15 K) = 100.2 ± 1.3 kJ mol<sup>–1</sup>, Δ<sub>vap</sub><i>S</i>°(298.15 K) = 201.8 ± 2.8 J mol<sup>–1</sup> K<sup>–1</sup>). From these data, the sublimation parameters of the complex were obtained (Δ<sub>sub</sub><i>H</i>°(298.15 K) = 135.3 ± 1.9 kJ mol<sup>–1</sup>, Δ<sub>sub</sub><i>S</i>°(298.15 K) = 315.3 ± 5.4 J mol<sup>–1</sup> K<sup>–1</sup>). The structure and thermal properties of [Sc(5Htfac)<sub>3</sub>] were compared with those of two scandium(III) β-diketonates bearing methyl and <i>tert</i>-butyl substituents in the ligand.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 7","pages":"628 - 636"},"PeriodicalIF":1.1,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. D. Strunin, I. A. Nikovskii, T. M. Aliev, Yu. V. Nelyubina
{"title":"Template Synthesis of the Copper(II) Complex with the Pyridylpyrazolone Ligand","authors":"D. D. Strunin, I. A. Nikovskii, T. M. Aliev, Yu. V. Nelyubina","doi":"10.1134/S1070328424601493","DOIUrl":"10.1134/S1070328424601493","url":null,"abstract":"<p>The reaction of the new bidentate ligand 1-(5-hydroxy-1-methyl-3-(pyridin-2-yl)-1<i>H</i>-pyrazol-4-yl)ethan-1-one (L) and copper(II) acetate affords a new copper(II) complex CuL<sub>2</sub>. The complex is isolated in the individual state and characterized by elemental analysis, cyclic voltammetry (CV), and X-ray diffraction (XRD) (CIF file CCDC no. 2309481). The synthesized complex is the first example of the copper(II) complexes with acylpyrazolones with the mixed β-diketonate and pyridylpyrazolone coordination. According to the CV data, CuL<sub>2</sub> exhibits the reversible redox process Cu<sup>II</sup>/Cu<sup>I</sup> and can act as a redox-active block when constructing polyheteronuclear complexes for molecular spintronics.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 7","pages":"564 - 570"},"PeriodicalIF":1.1,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. D. Tugushev, I. A. Nikovskii, S. A. Solov’eva, Yu. V. Nelyubina
{"title":"Synthesis of the Cobalt(II) Aqua Complex with Acetylpyridylpyrazolone","authors":"M. D. Tugushev, I. A. Nikovskii, S. A. Solov’eva, Yu. V. Nelyubina","doi":"10.1134/S107032842460150X","DOIUrl":"10.1134/S107032842460150X","url":null,"abstract":"<p>The reaction of the new bidentate ligand, 4-acetyl-2-phenyl-5-(pyridin-2-yl)-2,4-dihydro-3<i>H</i>-pyrazol-3-one (L), with cobalt(II) acetate in the presence of diazabicycloundecene as a base affords the mononuclear cobalt(II) aqua complex CoL<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>. The product of its crystallization from a DMF–water mixture (CoL<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>·2MeOH·2H<sub>2</sub>O) after drying in vacuo is characterized by X-ray diffraction (XRD), as well as the initial acetylpyrazolone L (CIF files CCDC nos. 2400710 and 2400711, respectively). The <i>cis</i> configuration of the ligands in the formed aqua complex and the presence of solvate methanol molecules in the complex (methanol was not a component of the mixture of solvents for crystallization) indicate that the complex is the product of solvolysis with water of the intermediate oxocubane complex Co<sub>4</sub>O<sub>4</sub>.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 7","pages":"653 - 661"},"PeriodicalIF":1.1,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Complexes of Pivaloyltrifluoroacetonates of Potassium and Rubidium with 18-Crown-6 Ether: Synthesis, Structure, Thermal Properties","authors":"D. V. Kochelakov, E. S. Vikulova","doi":"10.1134/S1070328425600494","DOIUrl":"10.1134/S1070328425600494","url":null,"abstract":"<div><p>In a search for volatile fluorinated compounds of potassium and rubidium, new complexes of the corresponding pivaloyltrifluoroacetonates (Ptac) with 18-crown-6 ether, [K(18C6)(Ptac)] (<b>I</b>) and [Rb(18C6)(Ptac)] (<b>II</b>), were synthesized. The compounds were characterized by elemental analysis, IR spectroscopy, and X-ray fluorescence analysis, and their structures were studied by single-crystal X-ray diffraction (SCXRD) in the range of 100–400 K (CCDC nos. 2429226–2429232 (<b>I</b>), 2429233–2429239 (<b>II</b>)). The complexes are isostructural and have an molecular mononuclear structure, with M…H and M…C contacts involving the <i>tert-</i>butyl group between fragments, forming chains. The thermal expansion tensors are elongated along this direction. X-ray diffraction analysis showed that the rubidium cation in such a complex can complete its coordination sphere with a solvent molecule (chloroform, CCDC no. 2429240 (<b>IIs</b>)). For <b>I</b>, <b>II</b>, and <b>IIs</b>, Hirshfeld surface were analyzed and a search for pseudoperiodicity in the crystal packings was carried out using the translational sublattice method. Thermogravimetric analysis showed that, unlike the initial pivaloyltrifluoroacetonates, complexes <b>I</b> and <b>II</b> are volatile and promising for testing in gas-phase processes of thin-film material deposition.</p></div>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 7","pages":"595 - 606"},"PeriodicalIF":1.1,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. V. Cherkasova, N. V. Pervukhina, N. V. Kuratieva, T. G. Cherkasova
{"title":"Structural Characteristics of (N-Thiocyanato)chromates(III) of Lanthanides(III) with Pyridine-3-carboxylic Acid","authors":"E. V. Cherkasova, N. V. Pervukhina, N. V. Kuratieva, T. G. Cherkasova","doi":"10.1134/S1070328425600366","DOIUrl":"10.1134/S1070328425600366","url":null,"abstract":"<p>To complete the studies of double complex compounds, (<i>N</i>-thiocyanato)chromates(III) of lanthanide complexes with pyridine-3-carboxylic acid, new compounds of the compositions [LnL<sub>3</sub>(H<sub>2</sub>O)<sub>2</sub>][Cr(NCS)<sub>6</sub>]·<i>n</i>H<sub>2</sub>O were synthesized from aqueous solutions (Ln = Pr (<b>I</b>), <i>n</i> = 1.5; Sm (<b>II</b>), Gd (<b>III</b>), Tb (<b>IV</b>), <i>n</i> = 2; L = C<sub>6</sub>H<sub>5</sub>NO<sub>2</sub>). The substances were studied by chemical analysis, IR spectroscopy, and PXRD (CCDC nos. 2427051–2427054). In the crystal structures of complexes <b>I</b>–<b>IV</b>, the cation has a chain structure due to the bidentate-bridging function of pyridine-3-carboxylic (nicotinic) acid molecules. The coordination environment of the lanthanide atoms consists of eight oxygen atoms belonging to six nicotinic acid molecules and two coordinated H<sub>2</sub>O molecules, located at the vertices of a distorted square antiprism. In the isolated [Cr(NCS)<sub>6</sub>]<sup>3–</sup> anions, the Cr coordination polyhedron consists of the N atoms of six thiocyanate ions and is close to a regular octahedron. In the structures of complexes <b>I</b>–<b>IV</b>, the space between polymeric cations is filled with complex anions and crystallization water molecules. Additionally, the structure is stabilized by intermolecular hydrogen bonds.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 7","pages":"579 - 585"},"PeriodicalIF":1.1,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. A. Rikhter, E. S. Vikulova, T. S. Sukhikh, A. V. Strigunovskaya, N. B. Morozova
{"title":"Structure and Properties of Magnesium Complexes with Bulky β-Diketones: 2,2,6,6-Tetramethylheptane-3,5-dione and Its Methoxy-Substituted Derivative","authors":"E. A. Rikhter, E. S. Vikulova, T. S. Sukhikh, A. V. Strigunovskaya, N. B. Morozova","doi":"10.1134/S1070328425600408","DOIUrl":"10.1134/S1070328425600408","url":null,"abstract":"<p>In order to study the effect of bulky terminal substituents in the β-diketonate ligand on the structure and properties of volatile magnesium compounds, complexes with 2,2,6,6-tetramethylheptane-3,5-dione (HThd) and, for the first time, with 2-methoxy-2,6,6-trimethylheptane-3,5-dione (HZis) were obtained. The complexes [Mg<sub>2</sub>(L)<sub>4</sub>] (L = Thd (<b>I</b>), Zis (<b>II</b>)), the synthesis intermediates [Mg(H<sub>2</sub>O)<sub>2</sub>(L)<sub>2</sub>] (L = Thd (<b>III</b>), Zis (<b>IV</b>)), and aqua derivative [Mg<sub>2</sub>(H<sub>2</sub>O)(Zis)<sub>4</sub>] (<b>V</b>) were characterized by elemental analysis and IR spectroscopy. The structures of binuclear complexes and the synthesis by-product [Mg<sub>7</sub>(Zis)<sub>6</sub>(μ-OH)<sub>6</sub>]Cl<sub>2</sub>·5CHCl<sub>3</sub> (<b>VI</b>) were established by X-ray diffraction (CCDC nos. 2424128 (<b>Ia</b>, a new polymorph), 2424130 (<b>II</b>), 2424129 (<b>V</b>), 2424126 (<b>V</b>·1/2CHCl<sub>3</sub>), 2424127 (<b>VI)</b> ). Both [Mg<sub>2</sub>(L)<sub>4</sub>] molecules are characterized by asymmetric environment of metal centers (the Mg coordination number (C.N.) is 5, 6), but in <b>I</b>, three μ,κ<sup>2</sup>:<sup>1</sup>-ligands occupy bridging positions, while in <b>II</b>, two ligands have different coordinations (μ,κ<sup>2</sup>:κ<sup>1</sup> and μ,κ<sup>2</sup>(O,O'):κ<sup>2</sup>(O',O<sub>OMe</sub>)). The inclusion of water in <b>II</b> to give <b>V</b> is not associated with any significant structural rearrangement, but C.N. of the unsaturated metal center changes from 5 to 6. Thermogravimetric analysis showed that complex <b>I</b> is more volatile and low-melting than <b>II</b>.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 7","pages":"615 - 627"},"PeriodicalIF":1.1,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. V. Andrienko, D. G. Samsonenko, E. A. Kovalenko
{"title":"Synthesis and Crystal Structure of Cobalt Complexes with Cucurbit[6]uril","authors":"I. V. Andrienko, D. G. Samsonenko, E. A. Kovalenko","doi":"10.1134/S1070328425600469","DOIUrl":"10.1134/S1070328425600469","url":null,"abstract":"<p>Four cobalt complexes with cucurbit[6]uril (CB[6]), [Co(H<sub>2</sub>O)<sub>6</sub>](Bdc)·CB[6]·14.5H<sub>2</sub>O (<b>I</b>), 2(H<sub>2</sub>NMe<sub>2</sub>)<sub>2</sub>[CoCl<sub>4</sub>]·CB[6]·12H<sub>2</sub>O (<b>II</b>), [{Co(H<sub>2</sub>O)<sub>4</sub>Cl}<sub>4</sub>(CB[6])]Cl<sub>4</sub>·9H<sub>2</sub>O (<b>III</b>), and [Co(H<sub>2</sub>O)<sub>6</sub>]-[Co(H<sub>2</sub>O)<sub>5</sub>(Dmf)][CoCl<sub>4</sub>]<sub>2</sub>·CB[6]·6H<sub>2</sub>O (<b>IV</b>), were prepared by evaporation of the reaction solution containing cobalt chloride and cucurbit[6]uril (CB[6]). According to X-ray diffraction data, compound <b>I</b> is formed by packing of cationic cobalt aqua complexes, terephthalate anions, and CB[6] molecules linked together by hydrogen bonds with crystallization water molecules into a supramolecular cage. The structure of compound <b>II</b> represents a packing of CB[6] molecules, dimethylammonium cations, and anionic cobalt chloro complexes. Compound <b>III</b> contains tetranuclear cationic cobalt chloro aqua complexes with CB[6], with chloride anions acting as counter-ions. The crystal structure of <b>IV</b> is a packing of cationic cobalt aqua complexes, anionic cobalt chloro complexes, and CB[6] molecules linked by hydrogen bonds with crystallization water molecules into a supramolecular cage. The resulting compounds are characterized by IR spectra and elemental analysis data.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 7","pages":"586 - 594"},"PeriodicalIF":1.1,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145327534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}