Mohd Abdul Fatah Abdul Manan, David B. Cordes, Aidan P. McKay
{"title":"Crystal structure of (Z)-2-fluorobenzyl 2-(5-fluoro-2-oxoindolin-3-ylidene)hydrazinecarbodithioate dimethyl sulfoxide monosolvate","authors":"Mohd Abdul Fatah Abdul Manan, David B. Cordes, Aidan P. McKay","doi":"10.1107/S205698902600561X","DOIUrl":"10.1107/S205698902600561X","url":null,"abstract":"<div><div>The title solvate, C<sub>16</sub>H<sub>11</sub>F<sub>2</sub>N<sub>3</sub>OS<sub>2</sub>·C<sub>2</sub>H<sub>6</sub>OS, crystallized with two independent molecules (<em>A</em> and <em>B</em>) in the asymmetric unit. Both molecules exhibit an L-shaped geometry but slightly differ in the orientation of the <em>o</em>-fluorobenzyl ring with respect to the 5-fluoroisatin ring: this dihedral angle is 89.1 (5)° in molecule <em>A</em> and 86.3 (5)° in molecule <em>B</em>. In the crystal, the <em>A</em> and <em>B</em> molecular conformations are stabilized <em>via</em> N—H⋯O intramolecular hydrogen bonds. Both independent molecules are linked <em>via</em> a weak directional C—H⋯F intermolecular hydrogen bond, resulting in the formation of dimers. The supramolecular network mainly comprises C<sub>ar</sub>—H⋯F and C<sub>ar</sub>—H⋯S hydrogen bonds, homohalogen Type I F⋯F halogen⋯halogen bonds and S⋯O chalcogen bonds.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"82 7","pages":"Pages 773-776"},"PeriodicalIF":0.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148389683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis and crystal structure of NaCsB5O8(OH)·H2O","authors":"Mei-Jun Zou, Xiao-Liang Zhou, Jian-Wen Cheng, Yi-Hang Wen","doi":"10.1107/S2056989026006018","DOIUrl":"10.1107/S2056989026006018","url":null,"abstract":"<div><div>The solvothermal reaction of H<sub>3</sub>BO<sub>3</sub>, Cs<sub>2</sub>CO<sub>3</sub>, NaBO<sub>2</sub>·4H<sub>2</sub>O, formic acid and ethanol led to a new mixed alkali metal borate, NaCsB<sub>5</sub>O<sub>8</sub>(OH)·H<sub>2</sub>O, sodium caesium pentaborate hydroxide monohydrate. Its crystal structure contains pentaborate [B<sub>5</sub>O<sub>10</sub>(OH)]<sup>6–</sup> building units, and displays a layered structure containing nine-membered rings. The layers extend parallel to the <em>ab</em> plane and are stacked along the <em>c</em> axis. Na<sup>+</sup> and Cs<sup>+</sup> cations are situated between the layers and bond to oxygen atoms with coordination numbers of 7 and 10, respectively. The water molecule likewise occupies the interlayer space and is hydrogen-bonded to the layers, both as a donor and an acceptor.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"82 7","pages":"Pages 821-824"},"PeriodicalIF":0.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148389767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Valeriia M. Ovdenko, Mircea-Odin Apostu, Irina A. Golenya, Anna Yu. Myronenko, Il’ya A. Gural’skiy
{"title":"Crystal structure of catena-poly[2-bromoethylammonium [tin(II)-tri-μ-bromido]]","authors":"Valeriia M. Ovdenko, Mircea-Odin Apostu, Irina A. Golenya, Anna Yu. Myronenko, Il’ya A. Gural’skiy","doi":"10.1107/S2056989026006079","DOIUrl":"10.1107/S2056989026006079","url":null,"abstract":"<div><div>In the structure of the title salt, {(C<sub>2</sub>H<sub>7</sub>BrN)[SnBr<sub>3</sub>]}<sub><em>n</em></sub>, the tin(II)atom features a strongly distorted octahedral environment ensured by six bromido ligands. By face-sharing, these SnBr<sub>6</sub> coordination octahedra are connected into polymeric chains, which propagate along the <em>b-</em>axis direction. Organic cations, stabilized in a <em>gauche</em> conformation, interleave the inorganic polymeric chains. Hydrogen bonds of the type N—H⋯Br between organic cations and inorganic chains create supramolecular layers parallel to the <em>ab</em> plane. These layers interact with each other thought weak C—H⋯Br contacts.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"82 7","pages":"Pages 825-828"},"PeriodicalIF":0.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148389655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis and crystal structure of fac-[3-bromo-6-(1H-pyrazol-1-yl-κN2)pyridazine-κN1]tricarbonylchloridorhenium dimethylformamide monosolvate","authors":"Duval Donoso, Nicolás Biget, Nancy Pizarro, Andrés Vega","doi":"10.1107/S2056989026006249","DOIUrl":"10.1107/S2056989026006249","url":null,"abstract":"<div><div>The crystal structure of the title rhenium(I) complex [ReCl(C<sub>7</sub>H<sub>5</sub>BrN<sub>4</sub>)(CO)<sub>3</sub>]·C<sub>3</sub>H<sub>7</sub>NO or <em>fac</em>-[(pypyrBr-κ<sup>2</sup><em>N</em>,<em>N</em>)Re(CO)<sub>3</sub>Cl]·DMF [pypyrBr = 3-bromo-6-(1<em>H</em>-pyrazol-1-yl)pyridazine] is reported. The compound was synthesized by reacting <strong>Re(CO)<sub>5</sub>Cl</strong> with <strong>pypyrBr</strong> [3-bromo-6-(1<em>H</em>-pyrazol-1-yl)pyridazine] in toluene under reflux, yielding orange crystals upon purification and crystallization. Structural analysis reveals a distorted octahedral coordination environment around the Re<sup>I</sup> center, comprising three facial carbonyl ligands, one chloride, and the bidentate <strong>pypyrBr</strong> ligand. The ligand exhibits near planarity with minimal torsional deviation, and the N—Re—N bite angle is 73.50 (12)°. The complex crystallizes as a 1:1 dimethylformamide solvate, consolidated by hydrogen bonding between DMF and the ligand. A Cambridge Structural Database search confirmed the novelty of this structure, as no prior reports exist for <strong>pypyrBr</strong> or its metal complexes. Spectroscopic characterization (<sup>1</sup>H NMR, <sup>13</sup>C NMR, IR) and elemental analysis support the proposed structure. This work expands the family of rhenium(I) tricarbonyl complexes with pyrazolyl-pyridazine ligands, relevant for photophysical and coordination chemistry applications.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"82 7","pages":"Pages 845-848"},"PeriodicalIF":0.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148389721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis and crystal structure of a new tetranuclear copper(II) complex based on the Schiff base (E)-2-[(2-hydroxy-5-methoxybenzylidene)amino]benzoic acid","authors":"Dawei Li, Wanying Qi, Jingjing Wang, Haiyang Dong, Kuilin Lv, Kaige Shi","doi":"10.1107/S2056989026005554","DOIUrl":"10.1107/S2056989026005554","url":null,"abstract":"<div><div>The title complex, bis{μ<sub>4</sub>-(<em>E</em>)-2-[(5-methoxy-2-oxidobenzylidene)amino]benzoato}bis{μ<sub>2</sub>-(<em>E</em>)-2-[(5-methoxy-2-oxidobenzylidene)amino]benzoato}tetracopper(II), [Cu<sub>4</sub>(C<sub>15</sub>H<sub>11</sub>NO<sub>4</sub>)<sub>4</sub>] or Cu<sub>4</sub>(<em>L</em>)<sub>4</sub>, was synthesized by the solvothermal reaction of (<em>E</em>)-2-[(2-hydroxy-5-methoxybenzylidene)amino]benzoic acid (H<sub>2</sub><em>L</em>) with copper(II) chloride. It crystallizes in the triclinic system with space group <em>P</em>ī. The tetranuclear structure consists of two fully symmetric dinuclear copper moieties. In the dinuclear copper structural unit, both copper(II) metal centers exhibit a five-coordinate NO<sub>4</sub> environment. Of the four coordinating oxygen atoms, two are phenolate oxygen atoms acting as bridges from two different ligands, while the other two oxygen atoms are derived from the carboxyl groups of two distinct ligands, respectively. <em>SHAPE</em> analysis indicates that both copper(II) centers adopt a distorted trigonal–bipyramidal (<em>D</em><sub>3<em>h</em></sub>) geometry. C—H⋯O hydrogen bonds and C—H⋯π interactions contribute to the cohesion of the crystal packing.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"82 7","pages":"Pages 794-798"},"PeriodicalIF":0.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148389740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis, crystal structure determination, Hirshfeld surface and crystal void analyses, interaction energy calculations and energy frameworks of N-(2-chlorophenyl)-N′-propanoylthiourea","authors":"Sharatha Kumar, Tuncer Hökelek","doi":"10.1107/S205698902600602X","DOIUrl":"10.1107/S205698902600602X","url":null,"abstract":"<div><div>The title compound, C<sub>10</sub>H<sub>11</sub>ClN<sub>2</sub>S, consists of a chlorophenyl ring and a propanoyl moiety bridged over a thiourea functional group. The dihedral angle between the planar propinoyl and thiourea groups is 8.33 (14)°, and they are oriented at 48.50 (14) and 56.09 (6)° with respect to the phenyl ring. The intramolecular N—H⋯O hydrogen bond forms an S(6) ring motif. In the crystal, N—H⋯S hydrogen bonds link two molecules, enclosing <em>R</em><sup>2</sup><sub>2</sub>(8) ring motifs, into centrosymmetric dimers. π–π stacking interactions help to consolidate the packing. Hirshfeld surface analysis revealed that the most important contributions for crystal packing are H⋯H (39.2%), H⋯Cl/Cl⋯H (15.8%), H⋯S/S⋯H (14.2%) and H⋯C/C⋯H (9.9%) interactions. The volume of the crystal voids and the percentage of free space were calculated to be 105.62 Å<sup>3</sup> and 9.33%, showing that there is no large cavity in the crystal packing. Computational methods indicated an N—H⋯S hydrogen-bonding energy of −53.5 kJ mol<sup>−1</sup>. Evaluations of the electrostatic, dispersion and total energy frameworks indicate that the crystal cohesion is dominated by electrostatic energy contributions.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"82 7","pages":"Pages 816-820"},"PeriodicalIF":0.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148389458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Paul R. Palme, Richard Goddard, Markus Leutzsch, Adrian Richter, Peter Imming, Rüdiger W. Seidel
{"title":"Crystal structure of the meso compound (2R,6S)-4-(5-bromopyrimidin-2-yl)-2,6-dimethylmorpholine","authors":"Paul R. Palme, Richard Goddard, Markus Leutzsch, Adrian Richter, Peter Imming, Rüdiger W. Seidel","doi":"10.1107/S2056989026006158","DOIUrl":"10.1107/S2056989026006158","url":null,"abstract":"<div><div>The title compound, C<sub>10</sub>H<sub>14</sub>N<sub>3</sub>OBr, was prepared by a nucleophilic aromatic substitution reaction between 2,6-dimethylmorpholine and 2-chloropyrimidine, followed by bromination of the pyrimidine ring. The compound crystallizes in the monoclinic system (space group <em>P</em>2<sub>1</sub>/c) with four molecules in the unit cell (<em>Z</em> = 4). The molecule exhibits approximate <em>C</em><sub>S</sub> point-group symmetry (r.m.s. deviation: 0.1072 Å). The arrangement of the molecules in the solid state is dominated by close packing. C—H⋯N contacts between pyrimidinyl rings in adjacent molecules with an <em>R</em><sup>2</sup><sub>2</sub>(6) motif are encountered, whereas the bromine atom does not exhibit any short contacts that could be regarded as halogen bonds.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"82 7","pages":"Pages 768-772"},"PeriodicalIF":0.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148389727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Crystal structures of fisetin dihydrate and luteolin monohydrate: crystallization from ethanol–water mixtures","authors":"Neta Caspin, Natalia Fridman, Avi Shpigelman","doi":"10.1107/S2056989026006353","DOIUrl":"10.1107/S2056989026006353","url":null,"abstract":"<div><div>The crystal structures of two hydrates of aglycon flavonoids, fisetin dihydrate [systematic name: 2-(3,4-dihydroxyphenyl)-3,7-dihydroxy-4<em>H</em>-1-benzopyran-4-one dihydrate, C<sub>15</sub>H<sub>10</sub>O<sub>6</sub>·2H<sub>2</sub>O, <em>P</em>2<sub>1</sub>, <em>Z</em> = 2] and luteolin monohydrate [systematic name: 2-(3,4-dihydroxyphenyl)-3,7-dihydroxy-4<em>H</em>-1-benzopyran-4-one monohydrate, C<sub>15</sub>H<sub>10</sub>O<sub>6</sub>·H<sub>2</sub>O, <em>P</em>4<sub>1</sub>2<sub>1</sub>2, <em>Z</em> = 8] were determined by single-crystal X-ray diffraction (SCXRD) and are reported for the first time. The two crystal forms were obtained from ethanol–water mixtures. These structures provide a foundation for future studies on the thermodynamic role of water molecules in crystal stability and packing, enabling further investigation of hydration effects on flavonoid solubility and stability.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"82 7","pages":"Pages 866-870"},"PeriodicalIF":0.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148389748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"SrZnSi3O8, a synthetic member of the feldspar group","authors":"Matthias Weil","doi":"10.1107/S2056989026005852","DOIUrl":"10.1107/S2056989026005852","url":null,"abstract":"<div><div>Strontium <em>tecto</em>-zincotrisilicate, SrZnSi<sub>3</sub>O<sub>8</sub>, is a synthetic member of the feldspar group with monoclinic symmetry (space group <em>P</em>2<sub>1</sub>/<em>n</em>, <em>Z</em> = 4). In comparison with the alkali feldspars, the aluminium-richest tetrahedral site in these minerals is completely substituted by Zn, and the alkali metal <em>M</em> site by strontium. The crystal structure is fully ordered, <em>i.e.</em> there is no mutual co-occupation of the tetrahedral sites or positional disorder of the <em>M</em> site. Although the tetrahedral site substituted by Zn exhibits significantly longer bond lengths [<blockquote><div><figure><img></figure></div></blockquote>(Zn—O) = 1.973 Å] due to the incorporation of the larger cation, there is no noticeable distortion of the SiO<sub>4</sub> tetrahedra compared to the aluminium-bearing feldspars. The coordination number of Sr<sup>2+</sup> is [6 + 2], with six short distances to oxygen sites in a narrow range [<blockquote><div><figure><img></figure></div></blockquote> = 2.560 Å] and two significantly longer distances > 3.10 Å.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"82 7","pages":"Pages 790-793"},"PeriodicalIF":0.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148389817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Dibasic 3,3′-dinitro-4,4′-bipyrazole-1,1′-diides of K, Rb and Cs reveal metal-selective ring–π over ring–N coordination","authors":"Kostiantyn V. Domasevitch , Vira V. Ponomarova","doi":"10.1107/S2056989026005037","DOIUrl":"10.1107/S2056989026005037","url":null,"abstract":"<div><div>Three new alkali metal pyrazolate salts, namely, poly[[μ-3,3′-dinitro-4,4′-bipyrazole-1,1′-diido]dipotassium], [K<sub>2</sub>(C<sub>6</sub>H<sub>2</sub>N<sub>6</sub>O<sub>4</sub>)]<sub><em>n</em></sub>, (<strong>1</strong>), its rubidium analogue [Rb<sub>2</sub>(C<sub>6</sub>H<sub>2</sub>N<sub>6</sub>O<sub>4</sub>)]<sub><em>n</em></sub>, (<strong>2</strong>), and poly[[[μ-3,3′-dinitro-4,4′-bipyrazole-1,1′-diido]dicaesium] monohydrate], {[Cs<sub>2</sub>(C<sub>6</sub>H<sub>2</sub>N<sub>6</sub>O<sub>4</sub>)]·H<sub>2</sub>O}<sub><em>n</em></sub>, (<strong>3</strong>), suggest that the electron-depleted nitropyrazolates may be still functional as efficient π-donors toward late alkali metal ions. The three-dimensional structures of <strong>1</strong> and <strong>2</strong> are very similar, being governed by μ<sub>4</sub>-κ<sup>1</sup>:κ<sup>1</sup>:κ<sup>1</sup>:κ<sup>1</sup> coordination of the pyrazolate anions as hard Lewis bases [K—N = 2.783 (3)–2.956 (3); Rb—N = 2.930 (4)–3.194 (4) Å]. In contrast, the structure of <strong>3</strong> reveals a dominant significance for the pyrazolate–π coordination, which produces two distinct motifs in the forms of finite Cs—π arrangement [Cs—ring centroid distance = 3.389 (3) Å] and one-dimensional —Cs—(π—Cs)<sub><em>n</em></sub>— sandwiches with slightly larger Cs—π separations at 3.474 (3) and 3.587 (3) Å. Weaker ion–dipole interactions with the nitro-O donors, at the distances approaching the sums of corresponding ionic radii, are relevant for the entire series and they complete typically high coordination numbers of the metal ions [CN = 8, 9]. These findings may find use in the construction of ion-selective receptors since the existing examples for the coordinative discrimination of the late alkali metal ions, beyond the ion-cavity size match considerations, are still rare.</div></div>","PeriodicalId":7367,"journal":{"name":"Acta Crystallographica Section E: Crystallographic Communications","volume":"82 6","pages":"Pages 683-691"},"PeriodicalIF":0.6,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148196958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}