M. N. Tahir, F. Naghiyev, V. Khrustalev, M. Ashfaq, N. Dege, I. Mamedov
{"title":"Preparation, Crystallographic Study, and Intermolecular Interactions Exploration by Computational Means of Polyfunctional Biphenyl-Based Aromatic Compound","authors":"M. N. Tahir, F. Naghiyev, V. Khrustalev, M. Ashfaq, N. Dege, I. Mamedov","doi":"10.1134/S0022476626090143","DOIUrl":"10.1134/S0022476626090143","url":null,"abstract":"<p>The condensation of the triketone with the aldehyde produces the Knoevenagel product. Then, because of the attack of the triketone carbanions to the double bond and the carbonyl group in the presence of a catalyst lead to the formation a cyclohexane derivative. Finally, as result of oxidation of the cyclohexane derivative taken place formation of the hexa-substituted benzene derivative which is a polyfunctional biphenyl-based aromatic compound. The synthesized polyfunctional biphenyl-based aromatic compound is structurally-characterized via single crystal XRD. Intramolecular O–H⋯O bonding is the main mechanism that regulates the molecular morphology. Multiple H-bonding and ring-involving interactions maintain the integrity of the crystal packing which are elaborated in details by Hirshfeld surface analysis. To determine if the channels are there or not, pore analysis is conducted. The interaction energies calculations are carried out at B3LYP/6-31G(<i>d,p</i>) electron level to explore the role of interaction energies in stability of the crystal packing.</p>","PeriodicalId":668,"journal":{"name":"Journal of Structural Chemistry","volume":"67 9","pages":"2046 - 2057"},"PeriodicalIF":1.5,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Experimental and Quantum-Chemical Characterization of an Imidazolidin-2-Ylidene-Based Pd-PEPPSI Complex","authors":"E. Ertuğrul, N. Özdemir, M. E. Günay","doi":"10.1134/S0022476626090076","DOIUrl":"10.1134/S0022476626090076","url":null,"abstract":"<p>In this study, a new N-heterocyclic carbene (NHC) precursor, 1-(hexyl)-3-(2,4,6-trimethylbenzyl) imidazolium chloride (<b>2</b>), is synthesized and utilized to prepare a novel Pyridine-Enhanced Precatalyst Preparation Stabilization and Initiation (PEPPSI)-type palladium(II) complex (<b>3</b>). The structures of both the imidazolium salt and the corresponding Pd-NHC complex are extensively characterized using FTIR, <sup>1</sup>H NMR, <sup>13</sup>C NMR, and UV-Vis. spectroscopy. The molecular structure of <b>3</b> is further elucidated by single crystal X-ray diffraction, revealing a distorted square-planar coordination geometry around the Pd(II) center. Spectroscopic evidence, particularly the disappearance of the C2–H resonance in NMR and the red shift of the C=N stretching frequency in IR, confirmed the successful formation of the carbene-metal bond. Furthermore, quantum-chemical calculations are performed using the wB97XD/SDD level of theory to investigate the structural, electronic, and spectroscopic properties of the synthesized compounds. The theoretical results showed high consistency with the experimental data, providing a deeper understanding of the electronic environment and geometric parameters of the PEPPSI-type system.</p>","PeriodicalId":668,"journal":{"name":"Journal of Structural Chemistry","volume":"67 9","pages":"1954 - 1965"},"PeriodicalIF":1.5,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. A. Slepukhin, E. B. Gorbunov, G. L. Rusinov, E. V. Verbitskiy
{"title":"Structural Study of the Interaction Product of 6-Nitro[1,2,4]Triazolo[1,5-a]Pyrimidine with 2,6-Di(tertbutyl)-4-(3-mercaptopropyl)Phenol","authors":"P. A. Slepukhin, E. B. Gorbunov, G. L. Rusinov, E. V. Verbitskiy","doi":"10.1134/S0022476626090106","DOIUrl":"10.1134/S0022476626090106","url":null,"abstract":"<p>The interaction product of 6-nitro[1,2,4]triazolo[1,5-<i>a</i>]pyrimidine with 2,6-di-(<i>tert</i>-butyl)-4-(3-mercaptopropyl)-phenol is structurally studied and characterized.</p>","PeriodicalId":668,"journal":{"name":"Journal of Structural Chemistry","volume":"67 9","pages":"1996 - 2001"},"PeriodicalIF":1.5,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. V. Skorova, E. S. Khodykina, K. M. Besedina, I. G. Borodkina, D. Y. Pobedinskaya, O. P. Demidov, A. A. Kolodina
{"title":"Synthesis and Structure of 2,3-Diaryl-6-Methyl-7-Phenyl-3,4-Dihydro-2H-Imidazo[2,1-b][1,3,4]Thiadiazines","authors":"A. V. Skorova, E. S. Khodykina, K. M. Besedina, I. G. Borodkina, D. Y. Pobedinskaya, O. P. Demidov, A. A. Kolodina","doi":"10.1134/S0022476626090131","DOIUrl":"10.1134/S0022476626090131","url":null,"abstract":"<p>New 2,3-diaryl-3,4-dihydro-2<i>H</i>-imidazo[2,1-<i>b</i>][1,3,4]thiadiazines are synthesized via base-catalyzed intramolecular cyclization of 2-arylmethylthio-N-arylidene-1<i>H</i>-imidazole-1-amines. The structures of the obtained compounds are established by <sup>1</sup>H and <sup>13</sup>C NMR, high-resolution mass spectrometry, and XRD.</p>","PeriodicalId":668,"journal":{"name":"Journal of Structural Chemistry","volume":"67 9","pages":"2034 - 2045"},"PeriodicalIF":1.5,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. I. Samigullina, N. M. Ivanova, K. V. Milyutin, A. N. Komogortsev
{"title":"Molecular and Crystal Structure of Three Crystal Solvates of an Azaspiro[4.5]dec-7-Ene-2,9-Dione Derivative","authors":"A. I. Samigullina, N. M. Ivanova, K. V. Milyutin, A. N. Komogortsev","doi":"10.1134/S0022476626090064","DOIUrl":"10.1134/S0022476626090064","url":null,"abstract":"<p>The molecular and crystal structure of 2-methyl-4,14-dioxo-15-(phenylamino)-1,10-dioxa-15-azadispiro[5.0.5<sup>7</sup>.3<sup>6</sup>]pentadec-2-en-5-yl 1<i>H</i>-imidazole-1-carboxylate (<b>1</b>) presented in the form of three crystal solvates with toluene (<b>1a</b>), water (<b>1b</b>), and dioxane (<b>1c</b>) in 1:1, 1:1, and 1:1.5 ratios, respectively, is comparatively analyzed. Pyramidalization of the nitrogen atom in the pyrrolidinone ring in the dioxane solvate is shown to change the arrangement of spiro-fused rings. The crystal-forming motifs governed by classical hydrogen bonds in these three modifications differ from each other due to the effect of solvent molecules on the formation of a 3D crystal structure. The nature of the solvent determines the 3D crystal packing: toluene molecules are located in hydrophobic channel cavities, dioxane is localized in second-type channel cavities, while water molecules (donors and acceptors in X–H⋯O hydrogen bonds) are localized in zero-dimensional voids. A comprehensive analysis of noncovalent interactions in the crystals of the three forms is performed using Hirshfeld surfaces.</p>","PeriodicalId":668,"journal":{"name":"Journal of Structural Chemistry","volume":"67 9","pages":"1944 - 1953"},"PeriodicalIF":1.5,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. V. Arsenyeva, A. V. Klimashevskaya, I. A. Yakushev, P. V. Dorovatovskii, A. V. Piskunov
{"title":"Germanium(II) and Tin(II) N-Aryloxy-β-Ketoiminate Complexes: Coordination Features and Catalytic Activity in Hydroboration Reactions","authors":"K. V. Arsenyeva, A. V. Klimashevskaya, I. A. Yakushev, P. V. Dorovatovskii, A. V. Piskunov","doi":"10.1134/S0022476626090027","DOIUrl":"10.1134/S0022476626090027","url":null,"abstract":"<p>The hybrid tridentate N-phenoxy-β-ketoiminate ligand (PacNacH<sub>2</sub>) is applied for the first time in the synthesis of low-valent Group 14 element derivatives. It enables the preparation and characterization of tin(II) (PacNacSn) and germanium(II) (PacNacGe) compounds being stable under anaerobic and moisture-free conditions. Single crystal X-ray diffraction studies reveals that tin complex PacNacSn exists as a dimer assembled through additional intermolecular Sn–O contacts. In catalytic tests, synthesized tetrylenes exhibit a high catalytic activity in benzaldehyde hydroboration with pinacolborane (HBPin) under mild conditions and with catalyst loadings as low as 0.1 mol %.</p>","PeriodicalId":668,"journal":{"name":"Journal of Structural Chemistry","volume":"67 9","pages":"1898 - 1910"},"PeriodicalIF":1.5,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Martinez de Andrade Orteiro, R. Dias do Nascimento, R. Marçal Sousa, T. C. Prado de Souza, C. T. de Carvalho, J. A. Ellena, R. A. Carvalho Souza, C. de Oliveira Rezende Jr., C. G. Oliveira
{"title":"Synthesis, Structural Characterization, and Thermal Analysis of Benzothiazole and Thiazole Derivatives","authors":"H. Martinez de Andrade Orteiro, R. Dias do Nascimento, R. Marçal Sousa, T. C. Prado de Souza, C. T. de Carvalho, J. A. Ellena, R. A. Carvalho Souza, C. de Oliveira Rezende Jr., C. G. Oliveira","doi":"10.1134/S0022476626090039","DOIUrl":"10.1134/S0022476626090039","url":null,"abstract":"<p>Benzothiazole and thiazole derivatives constitute an important class of heterocycles with wide-ranging biological and pharmacological applications. In this work, two compounds, a benzothiazole derivative (<i>N</i>-(6-chlorobenzo[d]thiazol-2-yl)cyclopropanecarboxamide) (<b>1</b>) and a thiazole derivative (<i>N</i>-(thiazol-2-yl)-butyramide) (<b>2</b>), are synthesized and characterized by FTIR, <sup>1</sup>H and <sup>13</sup>C{<sup>1</sup>H} NMR spectroscopy, and thermal analysis (TGA-DTA). Both compounds are also characterized by single crystal X-ray diffraction. The spectroscopic data confirmed the presence of the expected functional groups and structural features, supporting the successful synthesis and structural elucidation of the compounds. <i>In silico</i> ADMET (Absorption, Distribution, Metabolism, Excretion and Toxicity) evaluation revealed favorable physicochemical and pharmacokinetic profiles, with both compounds satisfying Lipinski and related drug-likeness rules.</p>","PeriodicalId":668,"journal":{"name":"Journal of Structural Chemistry","volume":"67 9","pages":"1911 - 1922"},"PeriodicalIF":1.5,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Supramolecular Sr(II) Complexes with Cucurbituril","authors":"I. V. Andrienko, D. G. Samsonenko, E. A. Kovalenko","doi":"10.1134/S0022476626090052","DOIUrl":"10.1134/S0022476626090052","url":null,"abstract":"<p>Five new supramolecular compounds containing strontium–cucurbituril complexes are synthesized: [{Sr(H<sub>2</sub>O)<sub>5</sub>}<sub>2</sub>(CB[6])]Cl<sub>4</sub>·2NH<sub>4</sub>Cl·5H<sub>2</sub>O (<b>1</b>), [{Sr(H<sub>2</sub>O)<sub>3</sub>Cl}<sub>3</sub>(CB[6])<sub>2</sub>]Cl<sub>3</sub>·10H<sub>2</sub>O (<b>2</b>), [{Sr<sub>2</sub>(H<sub>2</sub>O)<sub>10</sub>}{Sr(H<sub>2</sub>O)<sub>4</sub>Cl}<sub>2</sub>(CB[6])<sub>2</sub>]Cl<sub>6</sub>·18H<sub>2</sub>O (<b>3</b>), [{Sr<sub>2</sub>(H<sub>2</sub>O)<sub>9</sub>}{Sr(H<sub>2</sub>O)<sub>4</sub>Cl}<sub>2</sub>(CB[6])<sub>2</sub>]Cl<sub>6</sub>·18H<sub>2</sub>O (<b>4</b>), [Sr(H<sub>2</sub>O)<sub>4</sub>(dmf)(CB[6])][Sr(H<sub>2</sub>O)<sub>3</sub>(dmf)(CB[6])(H<sub>2</sub>btc)](btc)·18H<sub>2</sub>O (<b>5</b>). According to single crystal X-ray diffraction data, the strontium atom adopts coordination number 8 in all compounds. The crystal structures of <b>1-4</b> compounds contain cationic polymeric chains in which cucurbituril molecules alternate with mono- and/or dinuclear strontium aqua complexes. Compound <b>5</b> contains two types of cationic strontium–cucurbit[6]uril complexes: [Sr(H<sub>2</sub>O)<sub>3</sub>(dmf)(CB[6])(H<sub>2</sub>btc)]<sup>+</sup> and [Sr(H<sub>2</sub>O)<sub>4</sub>(dmf)(CB[6])]<sup>2+</sup>. They alternate in a checkerboard fashion to form slightly corrugated layers. A noteworthy feature of the structure of <b>5 </b>is that the coordinated DMF molecule is located in the inner cavity of the macrocyclic cavitand. Compounds <b>1-5</b> are characterized by single crystal X-ray diffraction, IR spectroscopy, and the elemental analysis.</p>","PeriodicalId":668,"journal":{"name":"Journal of Structural Chemistry","volume":"67 9","pages":"1934 - 1943"},"PeriodicalIF":1.5,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Preservation of the Total Order of Axial X–SI and SI←N Bonds (X = F, Cl, O, N, C) in Silatrane Molecules","authors":"E. F. Belogolova","doi":"10.1134/S0022476626090167","DOIUrl":"10.1134/S0022476626090167","url":null,"abstract":"<p>Seventy experimental (XRD and GED) structures of silatranes <i>X</i>Si(OCH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N are used to map the reaction pathway of <i>S</i><sub>N</sub>2-type substitution at tetrahedral silicon following the Bürgi – Dunitz approach. It is shown that only the use of high-quality XRD structures (<i>R</i>-factor <5%) allows observing the hyperbolic-type relationship between the axial <i>X</i>–Si and Si←N bond lengths in silatrane molecules. A unified line for the conservation of the total order of these bonds is obtained using the Levenberg – Marquardt method, and it is shown that the sum of the orders of these bonds is equal to unity for various <i>X</i>. This provides important evidence for the three-center four-electron character of the <i>X</i>–Si←N fragment and the presence of a covalent contribution to the Si⋯N interaction in silatrane molecules.</p>","PeriodicalId":668,"journal":{"name":"Journal of Structural Chemistry","volume":"67 9","pages":"2066 - 2076"},"PeriodicalIF":1.5,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. V. Rogachev, M. A. Shmelev, G. A. Razgonyaeva, A. A. Sidorov, I. L. Eremenko
{"title":"The Effect of Synthesis and Crystallization Conditions on the Compositions and Structures of Cadmium and Cobalt Dinitrobenzoate Complexes with Quinoline","authors":"A. V. Rogachev, M. A. Shmelev, G. A. Razgonyaeva, A. A. Sidorov, I. L. Eremenko","doi":"10.1134/S002247662609009X","DOIUrl":"10.1134/S002247662609009X","url":null,"abstract":"<p>The effect is investigated of the synthesis and crystallization conditions on the compositions and structures of Cd(II) complexes with anions of 3,5-dinitrobenzoic (3,5-dnb), 2,4-dinitrobenzoic (2,4-dnb) acids and quinoline (quin). Variation of solvents while maintaining a constant initial reagent ratio yields crystals of compounds with different compositions and architectures: [Cd<sub>3</sub>(quin)<sub>2</sub>(MeOH)<sub>2</sub>(3,5-dnb)<sub>6</sub>]·2quin·2MeOH (<b>1</b>), [Cd<sub>3</sub>(quin)<sub>2</sub>(THF)<sub>2</sub>(3,5-dnb)<sub>6</sub>] (<b>2</b>), [Cd<sub>2</sub>(quin)<sub>2</sub>(3,5-dnb)<sub>4</sub>]·quin·2MeCN (<b>3</b>), [Cd<sub>2</sub>(quin)<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>(3,5-dnb)<sub>4</sub>]<sub><i>n</i></sub>·2<i>n</i>(quin) (<b>4</b>), [Cd(quin)<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>(2,4-dnb)<sub>2</sub>]·2(quin) (<b>5</b>). For the comparative structural analysis of cadmium and cobalt(II) compounds, complex [Co<sub>3</sub>(MeCN)<sub>2</sub>(quin)<sub>2</sub>(3,5-dnb)<sub>6</sub>]·(<b>6</b>) is also synthesized. All prepared compounds are characterized by single crystal X-ray diffraction, IR spectroscopy, and the CHN- analysis. The structures and crystal packings of the synthesized complexes are examined in detail, and the key structure-forming noncovalent interactions are revealed in the crystals.</p>","PeriodicalId":668,"journal":{"name":"Journal of Structural Chemistry","volume":"67 9","pages":"1978 - 1995"},"PeriodicalIF":1.5,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}