{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,1,14]],"date-time":"2025-01-14T10:12:09Z","timestamp":1736849529847,"version":"3.33.0"},"reference-count":17,"publisher":"International Union of Crystallography (IUCr)","issue":"4","license":[{"start":{"date-parts":[[2023,3,28]],"date-time":"2023-03-28T00:00:00Z","timestamp":1679961600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"},{"start":{"date-parts":[[2023,3,28]],"date-time":"2023-03-28T00:00:00Z","timestamp":1679961600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"}],"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":[[2023,3,23]]},"published-print":{"date-parts":[[2023,4,1]]},"abstract":"<jats:p>The title compounds, C<jats:sub>32<\/jats:sub>H<jats:sub>35<\/jats:sub>NO<jats:sub>2<\/jats:sub>, (I), and C<jats:sub>30<\/jats:sub>H<jats:sub>29<\/jats:sub>Br<jats:sub>2<\/jats:sub>NO<jats:sub>2<\/jats:sub>, (II), differ by the presence of a bromine atom instead of a methyl atom in the <jats:italic>para<\/jats:italic> position of two benzene rings of compound (II). The two compounds have a structural overlap r.m.s. deviation of 0.27\u2005\u00c5. The pyran and seven-membered cycloheptene rings in both structures adopt boat and boat-sofa conformations, respectively. Intra- and intermolecular C\u2014H...O hydrogen bonds are responsible for the consolidation of the crystal packing of both molecules. In addition to this, weak C\u2014H...\u03c0 interactions are also observed. The intermolecular interactions were quantified and analysed using Hirshfeld surface analysis.<\/jats:p>","DOI":"10.1107\/s205698902300275x","type":"journal-article","created":{"date-parts":[[2023,3,28]],"date-time":"2023-03-28T08:02:33Z","timestamp":1679990553000},"page":"392-396","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":0,"title":["Crystal structures of (12<i>E<\/i>)-12-(4-benzylidene)-7,7,16-trimethyl-3-(4-methylphenyl)-1-oxa-16-azatetracyclo[11.2.1.0<sup>2,11<\/sup>.0<sup>4,9<\/sup>]hexadeca-2(11),4(9)-dien-5-one and (12<i>E<\/i>)-12-(4-bromobenzylidene)-73-(4-bromophenyl)-,7,16-trimethyl-10-oxa-16-azatetracyclo[11.2.1.0<sup>2,11<\/sup>.0<sup>4,9<\/sup>]hexadeca-2(11),4(9)-dien-5-one"],"prefix":"10.1107","volume":"79","author":[{"given":"C. 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