Daniil E. Smirnov , Oleg S. Morozov , Ekaterina S. Afanasyeva , Viktor V. Avdeev
{"title":"Synthesis and crystal structures of 4,4′-methylenebis(2,6-diethylaniline) and 4,4′-methylenebis(3-chloro-2,6-diethylaniline)","authors":"Daniil E. Smirnov , Oleg S. Morozov , Ekaterina S. Afanasyeva , Viktor V. Avdeev","doi":"10.1107/S2056989025000234","DOIUrl":"10.1107/S2056989025000234","url":null,"abstract":"<div><div>Epoxy curers 4,4′-methylenebis(2,6-diethylaniline) and 4,4′-methylenebis(3-chloro-2,6-diethylaniline) were prepared and studied by <sup>1</sup>H NMR and single-crystal X-ray analysis.</div></div><div><div>The title compounds 4,4′-methylenebis(2,6-diethylaniline) (C<sub>21</sub>H<sub>30</sub>N<sub>2</sub>, <strong>1</strong>) and 4,4′-methylenebis(3-chloro-2,6-diethylaniline) (C<sub>21</sub>H<sub>28</sub>Cl<sub>2</sub>N<sub>2</sub>, <strong>2</strong>) are of significant interest as curing agents for a wide range of resins and as building blocks for sterically demanding compounds in the synthesis of ligands for catalysis. This paper describes their synthesis and the preparation of single crystals, with their structures determined through single-crystal X-ray analysis. The presence of the chlorine substituent slightly affects the twist angle between the two aromatic components. The molecules of compound <strong>1</strong> form a network structure through intermolecular N—H⋯N bonds and C—H⋯π interactions, while in the crystal structure of compound <strong>2</strong>, the molecules are assembled solely through N—H⋯π interactions. Consequently, despite their chemical similarity, it is the precise structural data that enables us to explain their differing reactivity and opens up the possibility of evaluating steric properties for the development of new materials and ligands.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"81 2","pages":"Pages 148-152"},"PeriodicalIF":0.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11799795/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143381548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Maksym O. Plutenko , Oleksandr S. Vynohradov , Matti Haukka , Irina A. Golenya , Snizhana V. Gaidai
{"title":"Crystal structure and Hirshfeld surface analysis of a new polymorph of chloridobis(1,10-phenanthroline-κ2N,N′)copper(II) perchlorate","authors":"Maksym O. Plutenko , Oleksandr S. Vynohradov , Matti Haukka , Irina A. Golenya , Snizhana V. Gaidai","doi":"10.1107/S2056989025000209","DOIUrl":"10.1107/S2056989025000209","url":null,"abstract":"<div><div>Structure analysis of the title compound revealed a second polymorph (space group <em>C</em>2/<em>c</em>, <em>Z</em> = 4) with composition [CuCl(C<sub>12</sub>H<sub>8</sub>N<sub>2</sub>)<sub>2</sub>]<sup>+</sup>ClO<sub>4</sub><sup>−</sup>. Both the cation and anion in this polymorph exhibit point group symmetry 2.</div></div><div><div>The title salt (systematic name: 2-methyl-4-oxo-3,4-dihydroquinazolin-1-ium chloride), [CuCl(C<sub>12</sub>H<sub>8</sub>N<sub>2</sub>)<sub>2</sub>](ClO<sub>4</sub>), is comprised of a mononuclear complex cation [Cu(phen)<sub>2</sub>Cl]<sup>+</sup> (phen is 1,10-phenanthroline) and a perchlorate anion, ClO<sub>4</sub><sup>−</sup>, both with point group symmetry 2. The Cu<sup>II</sup> atom has a slightly distorted trigonal–bipyramidal coordination environment, defined by a N<sub>4</sub>Cl coordination set with the Cl atom and two N atoms at the equatorial sites. In the crystal, each phen ring is parallel to neighboring phen rings. The resulting significant π–π stacking interactions lead to zigzag chains extending parallel to [001]. Hirshfeld surface analysis suggests that the most important contributions to the surface contacts are from H⋯H (32.1%), H⋯C/C⋯H (18.2%), H⋯O/O⋯H (14.6%), H⋯Cl/Cl⋯H (12.7%) and C⋯C (10.6%) interactions.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"81 2","pages":"Pages 140-143"},"PeriodicalIF":0.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11799794/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143381459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis and crystal structure of 2,2,2-trichloroethyl N-{4-[6-(1-hydroxyethyl)-1,2,4,5-tetrazin-3-yl]benzyl}carbamate","authors":"J. Voss , H.G. Stammler , N. Sewald","doi":"10.1107/S2056989025000441","DOIUrl":"10.1107/S2056989025000441","url":null,"abstract":"<div><div>A 3,6-disubstituted 1,2,4,5-tetrazine was synthesized and characterized by single-crystal X-ray diffraction, revealing a complex hydrogen-bonded network with interactions between tetrazine N atoms and hydroxyl groups, thereby complementing the only scarcely explored features of tetrazines in the solid state.</div></div><div><div>An orthogonally addressable 3,6-disubstituted 1,2,4,5-tetrazine, namely 2,2,2-trichloroethyl <em>N</em>-{4-[6-(1-hydroxyethyl)-1,2,4,5-tetrazin-3-yl]benzyl}carbamate (C<sub>14</sub>H<sub>14</sub>Cl<sub>3</sub>N<sub>5</sub>O<sub>3</sub>), was synthesized and characterized by single-crystal X-ray diffraction. The tetrazine comprises a free hydroxyl and a 2,2,2-trichloroethoxycarbonyl protected amino group, which gives rise to hydrogen-bonding interactions each making the tetrazine highly linked in the solid state. The carbamate moieties form intermolecular hydrogen bonds, stacking the tetrazine molecules above each other, while lateral hydrogen bonds are formed between a tetrazine N atom and a hydroxyl group, the latter interaction being a scarcely explored structural feature of 1,2,4,5-tetrazines.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"81 2","pages":"Pages 164-168"},"PeriodicalIF":0.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11799789/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143381544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Atash V. Gurbanov , Firudin I. Guseinov , Aida I. Samigullina , Tuncer Hökelek , Khudayar I. Hasanov , Tahir A. Javadzade , Alebel N. Belay
{"title":"Synthesis and crystal structure analysis of 1-ethyl-1,3-dihydro-2H-benzo[d]imidazole-2-thione","authors":"Atash V. Gurbanov , Firudin I. Guseinov , Aida I. Samigullina , Tuncer Hökelek , Khudayar I. Hasanov , Tahir A. Javadzade , Alebel N. Belay","doi":"10.1107/S2056989025000519","DOIUrl":"10.1107/S2056989025000519","url":null,"abstract":"<div><div>Molecules of 1-ethyl-1,3-dihydro-2<em>H</em>-benzo[<em>d</em>]imidazole-2-thione are almost planar. In the crystal, intermolecular N—H⋯S hydrogen bonds link the molecules into pseudocentrosymmetric dimers. N—H⋯S hydrogen bonds, π–π interactions and a weak C—H⋯π(ring) interaction are effective in the stabilization of the crystal structure.</div></div><div><div>The asymmetric unit of the title compound, C<sub>9</sub>H<sub>10</sub>N<sub>2</sub>S, contains two crystallographically independent, almost planar, molecules. In the crystal, intermolecular N—H⋯S hydrogen bonds link the molecules into pseudocentrosymmetric dimers, enclosing <em>R</em><sub>2</sub><sup>2</sup>(8) ring motifs. There are mutual π–π interactions between the five- and six-membered rings of each independent molecule in the chosen asymmetric unit, with ring centroid-to-centroid distances of 3.6685 (12) and 3.7062 (12) Å. A weak C—H⋯π(ring) interaction is also observed. The N—H⋯S hydrogen bonds, the π–π interactions and the weak C—H⋯π(ring) interaction are effective in the stabilization of the crystal structure. The structure was refined as an inversion twin with a component occupancy ratio of 0.546 (15):0.454 (16).</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"81 2","pages":"Pages 169-171"},"PeriodicalIF":0.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11799793/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143381428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Crystal structure and Hirshfeld surface analysis of 2-methylquinazolin-4(3H)-one hydrochloride","authors":"Muzaffar Davlatboev , Sevara Allabergenova , Fazliddin Zulpanov , Ubaydullo Yakubov , Akmaljon Tojiboev , Tulkinjon Sattarov","doi":"10.1107/S2056989025000258","DOIUrl":"10.1107/S2056989025000258","url":null,"abstract":"<div><div>The quinazolinium moiety of the organic cation is located about a mirror plane. In the crystal, individual cations are linked into [010] zigzag chains by N—H⋯Cl hydrogen-bonding interactions.</div></div><div><div>The title salt (systematic name: 2-methyl-4-oxo-3,4-dihydroquinazolin-1-ium chloride), C<sub>9</sub>H<sub>9</sub>N<sub>2</sub>O<sup>+</sup>·Cl<sup>−</sup>, has orthorhombic (<em>Pbcm</em>) symmetry. Except for two methyl H atoms, all atoms of the molecular cation are located about a mirror plane, making the quinazolinium moiety exactly planar. Individual molecules are arranged in (001) layers in the crystal. Supramolecular features include N—H⋯Cl hydrogen-bonding interactions, leading to zigzag chains along [010] with <em>D</em><sub>1</sub><sup>1</sup>(2) and <em>C</em><sub>1</sub><sup>2</sup>(6) graph-set motifs. Additionally, weak π–π stacking interactions occur between benzene rings in adjacent layers. Hirshfeld surface analysis revealed that the most important contributions to the surface contacts are from H⋯H (36.1%), H⋯C/C⋯H (25.8%), and H⋯O/O⋯H (17.7%) interactions.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"81 2","pages":"Pages 144-147"},"PeriodicalIF":0.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11799796/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143381456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Crystal structure of poly[μ3-acetato-diaqua-μ3-sulfato-cerium(III)]: serendipitous synthesis of a layered coordination polymer exhibiting interlayer O—H⋯O hydrogen bonding","authors":"Niklas Ruser , Christian Näther , Norbert Stock","doi":"10.1107/S2056989024012313","DOIUrl":"10.1107/S2056989024012313","url":null,"abstract":"<div><div>In the crystal structure of the title compound, the Ce<sup>III</sup> cations are ninefold coordinated and linked into chains <em>via</em> the acetate anions and are further connected into layers by the sulfate dianions.</div></div><div><div>Single crystals of the title compound, [Ce(CH<sub>3</sub>COO)(SO<sub>4</sub>)(H<sub>2</sub>O)<sub>2</sub>]<sub><em>n</em></sub>, were obtained serendipitously by the reaction of Ce(NO<sub>3</sub>)<sub>3</sub>·6H<sub>2</sub>O with 2,5-thiophenedicarboxylic acid (H<sub>2</sub>TDC) and acetic acid in a mixture of ethanol and water, where it is assumed that the sulfate ions leached from the Teflon reactor, which was treated with peroxymonosulfuric acid prior to its use. Its asymmetric unit consists of one Ce<sup>III</sup> cation, one sulfate dianion, one acetate anion and two crystallographically independent water molecules, all of them located in general positions. The cerium cations are coordinated by three acetate anions (one <em>O</em>,<em>O</em>-chelating) and three sulfate dianions that are related by symmetry as well as two independent water molecules within an irregular CeO<sub>9</sub> coordination geometry. The Ce<sup>III</sup> cations are linked by the acetate ions into [010] chains, which are further connected into (001) layers by the sulfate dianions. Intralayer and interlayer O—H⋯O hydrogen bonds are observed. Powder X-ray diffraction shows that only traces of the title compound have formed together with a large amount of an unknown crystalline phase. Attempts to prepare the title compound in larger amounts and as a pure phase were unsuccessful.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"81 2","pages":"Pages 104-108"},"PeriodicalIF":0.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11799791/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143381475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Syntheses and crystal structures of the cerium-based coordination polymers poly[(acetic acid)bis(μ-5-carboxythiophene-2-carboxylato)bis(μ-thiophene-2,5-dicarboxylato)dicerium(III)] and poly[(μ-acetato)aqua(μ4-thiophene-2,5-dicarboxylato)cerium(III)]","authors":"Niklas Ruser , Christian Näther , Norbert Stock","doi":"10.1107/S2056989025000210","DOIUrl":"10.1107/S2056989025000210","url":null,"abstract":"<div><div>In the crystal structures of the title compounds, the Ce<sup>III</sup> cations are eightfold coordinated and linked into three-dimensional frameworks by ligands based on different deprotonated derivates of 2,5-thiophenedicarboxylic acid. Both compounds exhibit O—H⋯O hydrogen bonds.</div></div><div><div>The title compounds, [Ce<sub>2</sub>(C<sub>6</sub>H<sub>3</sub>SO<sub>4</sub>)<sub>2</sub>(C<sub>6</sub>H<sub>2</sub>SO<sub>4</sub>)<sub>2</sub>(CH<sub>3</sub>COOH)]<sub><em>n</em></sub> (<strong>1</strong>) and [Ce(CH<sub>3</sub>COO)(C<sub>6</sub>H<sub>2</sub>SO<sub>4</sub>)(H<sub>2</sub>O)]<sub><em>n</em></sub> (<strong>2</strong>) were synthesized by solvothermal reaction of Ce(NO<sub>3</sub>)<sub>3</sub>·6H<sub>2</sub>O with 2,5-thiophenedicarboxylic acid (H<sub>2</sub>TDC, C<sub>6</sub>H<sub>4</sub>SO<sub>4</sub>) and acetic acid in acetonitrile or ethanol/water, respectively. These compounds were obtained as single crystals among other crystalline phases. Both compounds belong to the family of three-dimensional coordination polymers. The asymmetric unit of <strong>1</strong> consists of two Ce<sup>III</sup> cations, two TDC<sup>2−</sup> dianions, two HTDC<sup>−</sup> anions and one acetic acid ligand, all of them located in general positions. The two Ce<sup>III</sup> cations are each coordinated by eight oxygen atoms in the form of distorted square antiprisms. These are bridged by carboxylate and carboxylic acid groups, forming mono-periodic hybrid inorganic building units (IBUs), which are connected into a three-dimensional network by the TDC<sup>2−</sup> and HTDC<sup>−</sup> ligands. Compound <strong>2</strong> has an asymmetric unit composed of one Ce<sup>III</sup> cation, one TDC<sup>2−</sup> dianion, one acetate anion and one water molecule in general positions. The cerium atom is eightfold coordinated by oxygen atoms. Edge-sharing CeO<sub>8</sub> polyhedra form a dinuclear IBU (Ce<sub>2</sub>O<sub>14</sub>). This IBU is bridged by six TDC<sup>2−</sup> linkers to nine other IBUs, forming a three-dimensional framework. Both title compounds exhibit additional O—H⋯O hydrogen bonds. Powder X-ray diffraction shows that both compounds were not obtained as pure phases.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"81 2","pages":"Pages 153-159"},"PeriodicalIF":0.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11799783/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143381492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis and crystal structure of [Sr(urea)(NO3)2]n","authors":"Aysanem Bektursinova , Zulfiya Djumanazarova , Zamira Uzakbergenova , Jamshid Ashurov , Akram A Khan , Shakhnoza Kadirova , Batirbay Torambetov","doi":"10.1107/S2056989024012386","DOIUrl":"10.1107/S2056989024012386","url":null,"abstract":"<div><div>The molecular and crystal structure of the [Sr(urea)(NO<sub>3</sub>)<sub>2</sub>]<sub><em>n</em></sub> complex was studied to investigate the various intermolecular interactions.</div></div><div><div>The crystal structure of poly[di-μ<sub>2</sub>-nitrato-μ<sub>2</sub>-urea-strontium(II)], [Sr(NO<sub>3</sub>)<sub>2</sub>(CH<sub>4</sub>N<sub>2</sub>O)]<sub><em>n</em></sub>, was determined using single-crystal X-ray diffraction. Crystallizing in the orthorhombic space group <em>Aba</em>2, the asymmetric unit consists of an Sr<sup>II</sup> cation, two nitrate anions, and two half urea molecules. The Sr<sup>II</sup> cation adopts a distorted decahedral geometry coordinated by ten oxygen atoms, with Sr—O bond lengths ranging from 2.573 (3) to 2.847 (5) Å. The nitrate anions act as bidentate ligands, displaying both terminal and bridging coordination modes. The structure features a robust coordination network supported by hydrogen bonding. These results provide insight into the coordination behaviour of Sr<sup>II</sup> with nitrate and urea ligands, contributing to the understanding of supramolecular architectures in metal–organic frameworks (MOFs).</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"81 2","pages":"Pages 96-98"},"PeriodicalIF":0.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11799799/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143381508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Khatira N. Aliyeva , Tuncer Hökelek , Victor N. Khrustalev , Rovnag M. Rzayev , Ajaya Bhattarai , Abel M. Maharramov , Namig G. Shikhaliyev
{"title":"Synthesis, crystal structure and Hirshfeld surface analysis of 5-oxo-N-phenyl-3-(thiophen-2-yl)-2,3,4,5-tetrahydro-[1,1′-biphenyl]-4-carboxamide","authors":"Khatira N. Aliyeva , Tuncer Hökelek , Victor N. Khrustalev , Rovnag M. Rzayev , Ajaya Bhattarai , Abel M. Maharramov , Namig G. Shikhaliyev","doi":"10.1107/S205698902500057X","DOIUrl":"10.1107/S205698902500057X","url":null,"abstract":"<div><div>The asymmetric unit of the title biphenyl-4-carboxamide contains two molecules. In the crystal, intermolecular N—H⋯O hydrogen bonds link the molecules into chains propagating parallel to the <em>c</em>-axis direction.</div></div><div><div>The asymmetric unit of the title compound, C<sub>23</sub>H<sub>19</sub>NO<sub>2</sub>S, contains two molecules that differ in the conformation of the two carboxamide moieties. In the crystal, intermolecular N—H⋯O hydrogen bonds link the molecules into chains propagating parallel to the <em>c</em>-axis direction. Between the molecules, weak C—H⋯π(ring) interactions are present, whereas π–π interactions are not observed. The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions to the crystal packing are from H⋯H (47.6%), H⋯C/C⋯H (33.4%) and H⋯O/O⋯H (11.6%) interactions. Orientational disorder is observed for both thiophene rings.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"81 2","pages":"Pages 177-182"},"PeriodicalIF":0.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11799798/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143381554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Trevor J. Gienau , Malachi Clay , William W. Brennessel , Carly R. Reed
{"title":"(2,9-Dimethyl-1,10-phenanthroline)bis[2-(pyridin-2-yl)phenyl]iridium(III) hexafluorophosphate and (2,9-dimethyl-1,10-phenanthroline)bis[5-methyl-2-(pyridin-2-yl)phenyl]iridium(III) hexafluorophosphate–diethyl ether–acetonitrile (1/0.61/0.78)","authors":"Trevor J. Gienau , Malachi Clay , William W. Brennessel , Carly R. Reed","doi":"10.1107/S2056989024012039","DOIUrl":"10.1107/S2056989024012039","url":null,"abstract":"<div><div>The title compounds exhibit Ir—C and Ir—N bond lengths typical of cyclometallated iridium compounds with phenylpyridine ligands. Methylation of the phenanthroline ligand leads to longer Ir—N bond lengths compared to the unmethylated analog.</div></div><div><div>The title compounds, [Ir(C<sub>14</sub>H<sub>12</sub>N<sub>2</sub>)(C<sub>11</sub>H<sub>8</sub>N)<sub>2</sub>]PF<sub>6</sub> (<strong>1</strong>) and [Ir(C<sub>14</sub>H<sub>12</sub>N<sub>2</sub>)(C<sub>12</sub>H<sub>10</sub>N)<sub>2</sub>]PF<sub>6</sub>·0.61C<sub>2</sub>H<sub>10</sub>O·0.78CH<sub>3</sub>CN (<strong>2</strong>), crystallize in the space groups <em>Pbca</em> and <em>P</em>1, respectively, each structure containing one monocationic Ir complex and one PF<sub>6</sub><sup>−</sup> anion in the asymmetric unit. The anion and solvent in compound <strong>2</strong> are disordered. The Ir—N(phenanthroline) bond lengths of <em>ca</em>. 2.21 Å indicate a greater steric effect of the 2,9-dimethyl-1,10-phenanthroline ligand compared to 1,10-phenanthroline. Both structures show offset parallel intermolecular π–π interactions between the pyridine rings of the phenanthroline ligands, and that of <strong>1</strong> also exhibits similar interactions between the phenyl and pyridine rings of the phenylpyridine ligands.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"81 2","pages":"Pages 127-131"},"PeriodicalIF":0.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11799788/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143381442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}