{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,1,14]],"date-time":"2025-01-14T05:11:14Z","timestamp":1736831474579,"version":"3.33.0"},"reference-count":22,"publisher":"International Union of Crystallography (IUCr)","issue":"2","license":[{"start":{"date-parts":[[2014,1,9]],"date-time":"2014-01-09T00:00:00Z","timestamp":1389225600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/journals.iucr.org\/services\/copyrightpolicy.html"},{"start":{"date-parts":[[2014,1,9]],"date-time":"2014-01-09T00:00:00Z","timestamp":1389225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/journals.iucr.org\/services\/copyrightpolicy.html#TDM"}],"content-domain":{"domain":["iucr.org","wiley.com","iucrj.org"],"crossmark-restriction":true},"short-container-title":["Acta Crystallogr C Struct Chem","Acta Crystallogr C","Acta Crystallogr C Cryst Struct Commun","Acta Cryst C","Acta Cryst C Struct Chem","Acta Cryst Sect C","Acta Cryst Sect C Struct Chem","Acta Crystallogr Sect C","Acta Crystallogr Sect C Struct Chem","Acta Crystallogr Sect C Cryst Struct Commun"],"published-print":{"date-parts":[[2014,2,1]]},"abstract":"<jats:p>(1<jats:italic>E<\/jats:italic>,4<jats:italic>E<\/jats:italic>)-1,5-Bis(2,6-difluorophenyl)penta-1,4-dien-3-one, C<jats:sub>17<\/jats:sub>H<jats:sub>10<\/jats:sub>F<jats:sub>4<\/jats:sub>O, (I), dimerizes under sunlight in chloroform solution to form the corresponding cyclobutane derivative, (2<jats:italic>E<\/jats:italic>,2\u2032<jats:italic>E<\/jats:italic>)-1,1\u2032-[2,4-bis(2,6-difluorophenyl)cyclobutane-1,3-diyl]bis[3-(2,6-difluorophenyl)prop-2-en-1-one], C<jats:sub>34<\/jats:sub>H<jats:sub>20<\/jats:sub>F<jats:sub>8<\/jats:sub>O<jats:sub>2<\/jats:sub>, (II). The crystal structure of (I) explains why no topochemical dimerization can occur in the solid state. In the solid, molecules of dimer (II) show the `truxillic acid'-type arrangement of crystallographic centres of inversion, with half a molecule per asymmetric unit and cell dimensions closely related to those of the monomer. Intermolecular interactions in both solids are dominated by C\u2014H...O and C\u2014H...F contacts and also comprise interactions with aromatic systems (C\u2014H...\u03c0 and \u03c0\u2013\u03c0).<\/jats:p>","DOI":"10.1107\/s2053229613034232","type":"journal-article","created":{"date-parts":[[2014,1,9]],"date-time":"2014-01-09T12:47:11Z","timestamp":1389271631000},"page":"202-206","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":1,"title":["Photochemical dimerization of a fluorinated dibenzylideneacetone in chloroform solution"],"prefix":"10.1107","volume":"70","author":[{"given":"Anke","family":"Schwarzer","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Edwin","family":"Weber","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2014,1,9]]},"reference":[{"key":"eg3145_bb1","doi-asserted-by":"crossref","first-page":"785","DOI":"10.1039\/c39750000785","author":"Alcock","year":"1975","journal-title":"J. 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