{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,4,5]],"date-time":"2025-04-05T04:06:07Z","timestamp":1743825967195,"version":"3.40.3"},"reference-count":22,"publisher":"International Union of Crystallography (IUCr)","issue":"4","license":[{"start":{"date-parts":[[2025,3,6]],"date-time":"2025-03-06T00:00:00Z","timestamp":1741219200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"},{"start":{"date-parts":[[2025,3,6]],"date-time":"2025-03-06T00:00:00Z","timestamp":1741219200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"}],"funder":[{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["23K21122"],"award-info":[{"award-number":["23K21122"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["iucr.org","wiley.com","iucrj.org"],"crossmark-restriction":true},"short-container-title":["Acta Crystallogr E Cryst Commun","Acta Cryst E","Acta Cryst Sect E","Acta Crystallogr E","Acta Crystallogr Sect E","Acta Cryst E Cryst Commun","Acta Cryst Sect E Cryst Commun"],"accepted":{"date-parts":[[2025,2,28]]},"published-print":{"date-parts":[[2025,4,1]]},"abstract":"<jats:p>The title compound, tetraoxa[2]perfluoroarene[2]triazine (C<jats:sub>20<\/jats:sub>H<jats:sub>6<\/jats:sub>F<jats:sub>8<\/jats:sub>N<jats:sub>6<\/jats:sub>O<jats:sub>6<\/jats:sub>), composed of two tetrafluorophenylene and two triazine moieties connected by four oxygen atoms, was crystallized <jats:italic>via<\/jats:italic> slow evaporation of a dichloromethane solution, yielding two polymorphs: block- (<jats:bold>I<\/jats:bold>) and plate-shaped (<jats:bold>II<\/jats:bold>) crystals. Polymorph <jats:bold>I<\/jats:bold> (triclinic, <jats:italic>P<\/jats:italic>\n                  <jats:overline>1<\/jats:overline>, <jats:italic>V<\/jats:italic> = 516\u2005\u00c5<jats:sup>3<\/jats:sup> at 173\u2005K) was previously reported by Yang <jats:italic>et al.<\/jats:italic> [(2015. <jats:italic>Org. Lett.<\/jats:italic> \n                  <jats:bold>15<\/jats:bold>, 4414\u20134417] whereas the newly identified polymorph <jats:bold>II<\/jats:bold> (triclinic, <jats:italic>P<\/jats:italic>\n                  <jats:overline>1<\/jats:overline>, <jats:italic>V<\/jats:italic> = 1085\u2005\u00c5<jats:sup>3<\/jats:sup> at 100\u2005K) shares the same space group but has a unit-cell volume twice as large, accommodating two symmetrically distinct molecules, <jats:italic>Molecule-1<\/jats:italic> and <jats:italic>Molecule-2<\/jats:italic>, with a different molecular arrangement. Since these crystals are expected to exhibit the characteristics of non-porous adaptive crystals, detailed analyses of intermolecular interactions were conducted, revealing that C\u2014F...\u03c0-hole interactions are more pronounced in <jats:bold>II<\/jats:bold> than in <jats:bold>I<\/jats:bold>. Hirshfeld surface analysis at 100\u2005K revealed that the primary contributions to the crystal packing in polymorph <jats:bold>I<\/jats:bold> were F...F (17.1%), F...H\/H...F (21.5%), C...H\/H...C (6.3%), C...F\/F...C (4.5%) and C...O\/O...C (9.2%) interactions, whereas in polymorph <jats:bold>II<\/jats:bold>, these interactions were F...F (9.9% and 10.0%), F...H\/H...F (20.9% and 26.5%), C...H\/H...C (6.3% and 2.9%), C...F\/F...C (8.5% and 10.0%) and C...O\/O...C (4.9% and 4.6%) for <jats:italic>Molecule-1<\/jats:italic> and <jats:italic>Molecule-2<\/jats:italic>, respectively. Powder X-ray diffraction analysis indicates that polymorph <jats:bold>I<\/jats:bold> is the more stable crystalline form, predominantly obtained through rapid precipitation or by grinding the crystals.<\/jats:p>","DOI":"10.1107\/s205698902500194x","type":"journal-article","created":{"date-parts":[[2025,3,6]],"date-time":"2025-03-06T08:19:31Z","timestamp":1741249171000},"page":"289-295","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":0,"title":["Polymorphism and Hirshfeld surface analysis of tetraoxa[2]perfluoroarene[2]triazine"],"prefix":"10.1107","volume":"81","author":[{"given":"Tadashi","family":"Kawasaki","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0969-8500","authenticated-orcid":true,"given":"Akiko","family":"Hori","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2025,3,6]]},"reference":[{"key":"tx2095_bb1","unstructured":"Bruker (2019). 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