Russian Journal of Coordination Chemistry最新文献

{"title":"Molecular Mn(II), Fe(III), and Dy(III) Complexes with the Pentadentate N3S2 Ligand","authors":"V. D. Sasnovskaya,&nbsp;L. V. Zorina,&nbsp;S. V. Simonov,&nbsp;M. V. Zhidkov,&nbsp;A. I. Dmitriev,&nbsp;D. V. Korchagin,&nbsp;E. B. Yagubskii","doi":"10.1134/S1070328425601013","DOIUrl":"10.1134/S1070328425601013","url":null,"abstract":"<div><p>The first molecular complexes of paramagnetic 3<i>d</i> (Mn, Fe) and 4<i>f</i> (Dy) metals with the pentadentate N₃S₂ ligand 2,6-diacetylpyridine bis(4-<i>N</i>-(4-ethylphenyl)thiosemicarbazone) (H₂L) were synthesized: [Mn^II(H₂L)Cl(CH₃OH)]Cl·2.5CH₃OH (<b>I</b>), [Fe^III(HL)Cl(CH₃OH)]Cl (<b>II</b>), and [Dy^III(L)(HL')]·4CH₃OH (<b>III</b>). According to X-ray data (CCDC nos. 2 472 028 (<b>I</b>), 2 472 029 (<b>II</b>), 2 472 030 (<b>III</b>)), all complexes are mononuclear. Complexes of the 3<i>d</i> metals <b>I</b> and <b>II</b> have pentagonal-bipyramidal coordination of the magnetic center: the equatorial plane is formed by the pentadentate N₃S₂ ligand, and the apical positions are occupied by two Cl and O atoms of monodentate axial ligands. The chelating ligand is the neutral H₂L in the Mn(II) complex and the monodeprotonated HL^– in the Fe(III) complex. In the 4<i>f</i>-metal complex, two ligands are coordinated to one Dy(III) center: the doubly deprotonated L^2– and the transformed ligand (HL')^–, in which one S atom is substituted by a MeO group. As a result, the Dy ion has a nine-coordinate environment DyN₇S₂. The magnetic properties of the Fe(III) complex were studied.</p></div>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 10","pages":"925 - 935"},"PeriodicalIF":1.1,"publicationDate":"2026-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145993643","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":"Uranyl Complexes of Related Tripodal 1,2,3-Triazole-Containing Ligands on the Ph3P(O) Platform. Structural Features in Solutions","authors":"A. G. Matveeva,&nbsp;M. P. Pasechnik,&nbsp;R. R. Aysin,&nbsp;O. V. Bykhovskaya,&nbsp;S. V. Matveev,&nbsp;T. V. Baulina,&nbsp;I. Yu. Kudryavtsev,&nbsp;V. K. Brel","doi":"10.1134/S1070328425601220","DOIUrl":"10.1134/S1070328425601220","url":null,"abstract":"&lt;p&gt;The study addresses the effect of the structures of two related tripodal ligands differing in the binding mode of the triazole moiety and the linker length, L&lt;sup&gt;1&lt;/sup&gt; = {2-[(1-Ph-1,2,3-triazol-4-yl)CH&lt;sub&gt;2&lt;/sub&gt;O]C&lt;sub&gt;6&lt;/sub&gt;H&lt;sub&gt;4&lt;/sub&gt;}&lt;sub&gt;3&lt;/sub&gt;P(O) and L&lt;sup&gt;2&lt;/sup&gt; = {2-[(4-Ph-1,2,3-triazol-1-yl)CH&lt;sub&gt;2&lt;/sub&gt;CH&lt;sub&gt;2&lt;/sub&gt;O]C&lt;sub&gt;6&lt;/sub&gt;H&lt;sub&gt;4&lt;/sub&gt;}&lt;sub&gt;3&lt;/sub&gt;P(O), on their coordination and extraction properties towards [UO&lt;sub&gt;2&lt;/sub&gt;]&lt;sup&gt;2+&lt;/sup&gt;. The structure of complexes [UO&lt;sub&gt;2&lt;/sub&gt;(NO&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;L&lt;sup&gt;1&lt;/sup&gt;] (&lt;b&gt;I&lt;/b&gt;) and [UO&lt;sub&gt;2&lt;/sub&gt;(NO&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;L&lt;sup&gt;2&lt;/sup&gt;] (&lt;b&gt;II&lt;/b&gt;) was studied in the solid state (elemental analysis, IR and Raman spectroscopy) and in solution (IR and multinuclear (&lt;sup&gt;1&lt;/sup&gt;H, &lt;sup&gt;13&lt;/sup&gt;C, &lt;sup&gt;31&lt;/sup&gt;H) NMR spectroscopy). According to the body of spectral and quantum chemical data, both ligands are coordinated in the bidentate fashion in solid uranyl complexes, with L&lt;sup&gt;1&lt;/sup&gt; being P(O),N&lt;sup&gt;3&lt;/sup&gt;-coordinated and L&lt;sup&gt;2&lt;/sup&gt; being P(O),N&lt;sup&gt;2&lt;/sup&gt; coordinated. The possibility of equilibria in solutions of &lt;b&gt;I&lt;/b&gt; and &lt;b&gt;II&lt;/b&gt; was evaluated at the ZORA-PBE0/ZORA-Def2-TZVP, ZORA-SARC-TZVP level of theory using the CPCM solvation model (MeCN). According to experimental and calculated data, the major components of complex &lt;b&gt;I&lt;/b&gt; in CD&lt;sub&gt;3&lt;/sub&gt;CN and CDCl&lt;sub&gt;3&lt;/sub&gt; are neutral species with the P(O),N&lt;sup&gt;3&lt;/sup&gt;-coordinated ligand, while minor components are the neutral complex with the P(O)-coordinated ligand and ionic complexes. The equilibrium shifts when the solvent is replaced. In a solution of &lt;b&gt;II&lt;/b&gt; in CD&lt;sub&gt;3&lt;/sub&gt;CN, neutral species with P(O)-coordinated ligand occur in equilibrium with ionic complexes (as contact ion pairs), with the latter predominating. In CDCl&lt;sub&gt;3&lt;/sub&gt;, the equilibrium is more complicated: apart from the above species, new ionic complexes appear in the equilibrium as solvent-separated and partly dissociated ion pairs, with their total content being more than a half. In acetonitrile solutions, the formation of intramolecular C&lt;sub&gt;tr&lt;/sub&gt;–H…O&lt;sub&gt;U&lt;/sub&gt;, C–H…O&lt;sub&gt;U&lt;/sub&gt;, and C&lt;sub&gt;tr&lt;/sub&gt;–H…O&lt;sub&gt;NO3&lt;/sub&gt; H-bonds was established in complexes &lt;b&gt;I&lt;/b&gt; and &lt;b&gt;II&lt;/b&gt;. The calculated energy of H-bonds is in good agreement with published data. In CDCl&lt;sub&gt;3&lt;/sub&gt; solutions, no such H-bonds were observed due to specific solvation. The difference between the requirements of the coordination polyhedra of lanthanide and uranyl cations to the structures of L&lt;sup&gt;1&lt;/sup&gt; and L&lt;sup&gt;2&lt;/sup&gt; for complex formation is analyzed. Data on the structures of complexes &lt;b&gt;I&lt;/b&gt; and &lt;b&gt;II&lt;/b&gt; in acetonitrile were correlated with the efficiency of U(VI) extraction with L&lt;sup&gt;1&lt;/sup&gt; and L&lt;sup&gt;2&lt;/sup&gt; from aqueous phase into 1,2-dichloroethane. Similar data for lanthanum complexes &lt;b&gt;III&lt;/b&gt; and &lt;b&gt;IV&lt;/b&gt; and the extraction efficiency of Eu(III) were used for comparison. Due to specific solvation, chloroform was not use","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 10","pages":"912 - 924"},"PeriodicalIF":1.1,"publicationDate":"2026-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145993730","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":"Synthesis, Properties, and Structure of Ferrocenoylpyrazoles","authors":"Yu. M. Ivanova,&nbsp;A. A. Simenel,&nbsp;A. A. Dan’shina,&nbsp;K. O. Titov,&nbsp;E. A. Khakina,&nbsp;A. N. Rodionov","doi":"10.1134/S1070328425600809","DOIUrl":"10.1134/S1070328425600809","url":null,"abstract":"<p>The reaction of 3,5-disubstituted pyrazoles with ferrocenylvinyl ketone <b>1</b> produced new ferrocenoylpyrazoles <b>3a</b>–<b>3e</b>. The reaction of <b>1</b> with unsymmetrical 3(5)-methyl-5(3)-trifluoromethylpyrazole gave both isomers, with their ratio depending on the reaction conditions. Both isomers <b>3d</b> and <b>3e</b> were isolated in pure form and characterized by mass spectrometry, NMR spectroscopy, and cyclic voltammetry. The structure of isomer <b>3e</b>, which is the product of thermodynamic control, was confirmed by X-ray diffraction analysis (CCDC no. 2450072).</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 9","pages":"851 - 858"},"PeriodicalIF":1.1,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145772119","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":"Bi- and Tetranuclear Bromide Complexes of Antimony(III) and Bismuth(III) with 1,1'-(Hexane-1,6-diyl)bis(3-halopyridinium) Cations","authors":"I. A. Shentseva,&nbsp;A. N. Usol’tsev,&nbsp;N. A. Korobeinikov,&nbsp;M. N. Sokolov,&nbsp;S. A. Adonin","doi":"10.1134/S1070328425600986","DOIUrl":"10.1134/S1070328425600986","url":null,"abstract":"<p>Five new bromide complexes of antimony(III) and bismuth(III) with dicationic species (3‑ClPyC₆)[SbBr₆]₂ (<b>I</b>), (3-ClPyC₆)₂[Sb₄Br₁₆] (<b>II</b>), (3-ClPyC₆)₃[Bi₂Br₉]₂ (<b>III</b>), (3-BrPyC₆)₃[Sb₂Br₉]₂ (<b>IV</b>), and (3-BrPyC₆)₃[Bi₂Br₉]₂ (<b>V</b>) based on substituted 3-halopyridines {(3-XPy)₂(CH₂)₆}²⁺ (X = Cl, Br) were obtained. The structures of the compounds were determined by X-ray diffraction analysis (CCDC nos. 2457726–2457730). The features of halogen···halogen interactions between the cations and anions were analyzed.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 9","pages":"795 - 805"},"PeriodicalIF":1.1,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145772114","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":"Synthesis and Structure of New M(II)/Cr(III) Coordination Compounds (M = Fe, Ni, Zn, Cd) with Cyclobutane-1,1-dicarboxylate Anions and 1,10-Phenanthroline","authors":"E. S. Bazhina,&nbsp;A. S. Mokicheva,&nbsp;M. A. Shmelev,&nbsp;M. A. Kiskin,&nbsp;I. L. Eremenko","doi":"10.1134/S1070328425601098","DOIUrl":"10.1134/S1070328425601098","url":null,"abstract":"<p>The reactions of chromium(III) potassium sulfate with the potassium salt of cyclobutane-1,1-dicarboxylic acid (H₂Cbdc), 1,10-phenanthroline (Phen), and <i>d</i>-metal (Fe^II, Ni^II, Zn^II) sulfate yielded ionic compounds [M^II(Phen)₃][Cr^III(Cbdc)₂(H₂O)₂][Cr^III(Cbdc)₂(Phen)]·<i>n</i>H₂O (<b>I</b>: M = Fe, <i>n</i> = 9.5; <b>II</b>: M = Ni, <i>n</i> = 10; <b>III</b>: M = Zn, <i>n</i> = 9.1). The structures of <b>I</b>–<b>III</b> are formed by isolated [M^II(Phen)₃]²⁺ cations containing a <i>d</i>-metal ion and chromium(III)-containing anions of two types, [Cr^III(Cbdc)₂(H₂O)₂]^– and [Cr^III(Cbdc)₂(Phen)]^–. A similar reaction with cadmium sulfate resulted in the formation of the trinuclear molecular complex [Cd^IICr<span>(_{2}^{{{text{III}}}})</span>(Cbdc)₄(Phen)₄]·7.5H₂O (<b>IV</b>), in which two heteroleptic {Cr^III(Cbdc)₂(Phen)} blocks are bound to {Cd(Phen)₂} moiety by bridging carboxylate groups. The crystal structures of compounds <b>I</b>–<b>IV</b> were determined by single crystal X-ray diffraction (CCDC nos. 2478737 (<b>I</b>), 2478738 (<b>II</b>), 2478739 (<b>III</b>), 2478740 (<b>IV</b>)).</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 9","pages":"781 - 794"},"PeriodicalIF":1.1,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145772117","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":"Spin State of the Iron(II) Complex with a New Representative of the 2,6-Bis(pyrazol-3-yl)pyridine Series and the Effect of Protonation in Solution","authors":"E. S. Safiullina,&nbsp;I. A. Nikovskii,&nbsp;E. P. Antoshkina,&nbsp;Yu. V. Nelyubina","doi":"10.1134/S1070328425600779","DOIUrl":"10.1134/S1070328425600779","url":null,"abstract":"<p>Reaction of a new representative of the 2,6-bis(pyrazol-3-yl)pyridine series (L) containing protonatable amino groups with iron(II) perchlorate hexahydrate yielded a new complex [Fe(L)₂](ClO₄)₂, which was characterized by X-ray diffraction analysis (CCDC no. 2448780), and the possibility of its in situ protonation by tetrafluoroboric acid was evaluated. Using an approach based on the analysis of temperature-dependent changes in the ¹H NMR chemical shifts, it was established that in the temperature range 200–325 K, the obtained complex exists in the high-spin state, which is retained both in the presence of the protonating agent (HBF₄) in solution and in the crystalline state.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 9","pages":"842 - 850"},"PeriodicalIF":1.1,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145772118","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":"Crystal Structure of the Potassium Salt of the 9,9',12,12'-Tetraiodo Derivative of Cobalt Bis(dicarbollide): The Role of Intermolecular Interactions Involving Iodine Substituents","authors":"K. Yu. Suponitskii,&nbsp;N. A. Gorodetskaya,&nbsp;S. A. Anufriev,&nbsp;I. B. Sivaev","doi":"10.1134/S1070328425601025","DOIUrl":"10.1134/S1070328425601025","url":null,"abstract":"<p>The potassium salt of the 9,9',12,12'-tetraiodo derivative of cobalt bis(dicarbollide) containing substituents in the lower belt of the dicarbollide ligand was obtained by the reaction of anhydrous CoBr₂ with the trimethylammonium salt of 5,6-diiodo <i>nido</i>-carborane (Me₃NH)[5,6-I₂-7,8-C₂B₉H₁₀] in the presence of <i>t-</i>BuOK in refluxing 1,2-dimethoxyethane. The structure of [K(DME)_3.25(H₂O)_0.75][9,9',12,12'-I₄-3,3'-Co(1,2-C₂B₉H₉)₂] was determined by single-crystal X-ray diffraction. It was shown that iodine atoms at positions 9 and 12 of the dicarbollide ligand are poor electron pair acceptors, which prevents the formation of type II intermolecular halogen bonds. Unlike other known iodo derivatives of cobalt bis(dicarbollide) containing substituents in the upper belt of the dicarbollide ligands, in the 9,9',12,12'-tetraiodo derivative of cobalt bis(dicarbollide), the main structure-forming contacts are intermolecular C–H···I hydrogen bonds and weak type I halogen bonds.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 9","pages":"822 - 828"},"PeriodicalIF":1.1,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145772120","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":"Trinuclear Manganese(II) Complex Based on Diisopropyl(pyridin-2-ylmethyl)phosphine Oxide","authors":"K. R. Enikeeva,&nbsp;D. R. Islamov,&nbsp;S. K. Amerhanova,&nbsp;A. D. Voloshina,&nbsp;I. E. Kolesnikov,&nbsp;E. I. Musina,&nbsp;A. A. Karasik","doi":"10.1134/S1070328425600950","DOIUrl":"10.1134/S1070328425600950","url":null,"abstract":"<p>A new trinuclear manganese(II) carboxylate complex [Mn₃L₂(OAc)₆] (<b>I</b>), where L is diisopropyl(pyridin-2-ylmethyl)phosphine oxide, was synthesized. The composition of complex <b>I</b> was confirmed by mass spectrometry, IR spectroscopy, and elemental analysis. The crystal structure of the complex was determined by X-ray diffraction (CCDC no. 2447670). The luminescence and cytotoxicity of <b>I</b> were studied in relation to M-HeLa and HuTu80 cancer cell lines and Chang Liver normal cell line It was found that compound <b>I</b> exhibited high cytotoxicity against the HuTu80 cancer cells.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 9","pages":"773 - 780"},"PeriodicalIF":1.1,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145772115","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":"Search for Combinations of Monocarboxylic Acids to Obtain Mixed-Anion Complexes of Cadmium and Zinc","authors":"M. A. Shmelev,&nbsp;A. S. Chistyakov,&nbsp;J. K. Voronina,&nbsp;G. A. Razgonyaeva,&nbsp;A. A. Sidorov,&nbsp;I. L. Eremenko","doi":"10.1134/S1070328425600603","DOIUrl":"10.1134/S1070328425600603","url":null,"abstract":"<p>The possibility of obtaining mixed-anion complexes of cadmium and zinc with various combinations of monocarboxylic acid anions was studied. When pentafluorobenzoate (Pfb), benzoate (Bz) anions, and 1,10-phenanthroline (Phen) were combined in the composition of the compounds, crystals of previously described homoanion compounds were formed. When 2,3,5,6-tetrafluoro-4-(trifluoromethyl)phenylacetate (Tfpha) or 3,5-dinitrobenzoate (Dnb) anions were used instead of pentafluorobenzoate, mixed-anion compounds [Cd₂(Phen)₂(Tfpha)₂(Bz)₂] (<b>I</b>), [Cd₃(Phen)₂(Dnb)₃(Bz)₃][Cd₃(Phen)₂(Dnb)_4.5(Bz)_1.5] (<b>II</b>), [Zn₃(Phen)₂(Dnb)₄(Bz)₂]·2(C₆H₆) (<b>III</b>), and [ZnCd₂(Phen)₂(Dnb)₅(Bz)]·3(C₆H₆)·(MeOH) (<b>IV</b>) were isolated. According to X-ray diffraction data, in the structures of compounds <b>II</b> and <b>IV</b>, some anion positions are simultaneously occupied by Bz and Dnb anions in different ratios. The compounds [Cd₂(Phen)₂(Dnb)₂(Pha)₂] (<b>V</b>) and [Zn(H₂O)(Phen)(Dnb)(Pha)]·MeCN (<b>VI</b>, Pha = phenylacetate anion) demonstrate that mixed-anion complexes can also form when conformationally flexible phenylacetate and sterically more rigid 3,5-dinitrobenzoate anions are combined on zinc and cadmium ions. The synthesized compounds <b>I</b>–<b>VI</b> were characterized by X-ray diffraction analysis (CCDC nos. 2443227, 2443228, 2443229, 2443230, 2443231, and 2443232, respectively), IR spectroscopy, and CHN analysis. The structures and crystal packings of the obtained complexes were analyzed in detail. It was found that the main contribution to the stabilization of the crystal packings arises from NO₂···π, π···π, C–H···F, and N–O···π interactions.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 9","pages":"806 - 821"},"PeriodicalIF":1.1,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145772112","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":"Lithium Derivatives of 5-Methyl-5,10-dihydroindeno[1,2-b]indole and 1,3,5-Trimethyl-6H-dihydroindeno[2,1-b]indole: Synthesis and Molecular Structure","authors":"A. O. Tolpygin,&nbsp;A. V. Cherkasov,&nbsp;G. K. Fukin,&nbsp;I. E. Nifant’ev,&nbsp;A. A. Trifonov","doi":"10.1134/S1070328425600846","DOIUrl":"10.1134/S1070328425600846","url":null,"abstract":"<p>The reaction of 1,3-dimethyl-5,6-dihydroindeno[2,1-b]indole with methyl iodide in the presence of cetyltrimethylammonium bromide produced 1,3,5-trimethyl-6<i>H</i>-indeno[2,1-b]indole (L¹H). The molecular structure of the compound was confirmed by X-ray diffraction analysis. The ligands L¹H and 5-methyl-5,10-dihydroindeno[1,2-b]indole (L²H) were metallated with <i>n</i>-butyllithium in diethyl ether at 0°C to give the corresponding lithium derivatives L¹Li(Et₂O)₂ (<b>I</b>) and L²Li(Et₂O)₂ (<b>II</b>). According to the X-ray diffraction data, lithium complex <b>II</b> has a monomeric structure, and the asymmetric unit contains two crystallographically independent molecules of the complex. In molecule <b>IIb</b>, the lithium cation is coordinated to the five-membered ring of the ligand in an η⁵-type, whereas in molecule <b>IIa</b>, coordination occurs in an η³-type manner.</p>","PeriodicalId":759,"journal":{"name":"Russian Journal of Coordination Chemistry","volume":"51 9","pages":"859 - 866"},"PeriodicalIF":1.1,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145772116","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}