{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,1,14]],"date-time":"2025-01-14T08:48:00Z","timestamp":1736844480360,"version":"3.33.0"},"reference-count":18,"publisher":"International Union of Crystallography (IUCr)","issue":"3","license":[{"start":{"date-parts":[[2017,2,13]],"date-time":"2017-02-13T00:00:00Z","timestamp":1486944000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/journals.iucr.org\/services\/copyrightpolicy.html"},{"start":{"date-parts":[[2017,2,13]],"date-time":"2017-02-13T00:00:00Z","timestamp":1486944000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/journals.iucr.org\/services\/copyrightpolicy.html#TDM"}],"funder":[{"name":"United States National Science Foundation","award":["0521237","0911324"],"award-info":[{"award-number":["0521237","0911324"]}]}],"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"],"accepted":{"date-parts":[[2017,2,7]]},"published-print":{"date-parts":[[2017,3,1]]},"abstract":"<jats:p>Molecules with well-defined structures that feature closely stacked aromatic rings are important for understanding \u03c0\u2013\u03c0 interactions. A previously reported C-shaped molecule with bithiophene-substituted quinoxaline rings suspended from an aliphatic bridge that holds the aromatic rings in close proximity exists as a pair of <jats:italic>syn<\/jats:italic> and <jats:italic>anti<\/jats:italic> diastereomers. The <jats:italic>anti<\/jats:italic> isomer, namely (1\u03b1,2\u03b2,4\u03b2,5\u03b1,16\u03b1,17\u03b2,19\u03b2,20\u03b1)-1,5,16,20-tetrachloro-31,31,32,32-tetramethoxy-11,26-bis[5-(thiophen-2-yl)thiophen-2-yl]-7,14,22,29-tetraazanonacyclo[18.10.1.1<jats:sup>5,16<\/jats:sup>.0<jats:sup>2,19<\/jats:sup>.0<jats:sup>4,17<\/jats:sup>.0<jats:sup>6,15<\/jats:sup>.0<jats:sup>8,13<\/jats:sup>.0<jats:sup>21,30<\/jats:sup>.0<jats:sup>23,28<\/jats:sup>]dotriaconta-6(15),7,9,11,13,21(30),22,24,26,28-decaene chloroform monosolvate, C<jats:sub>48<\/jats:sub>H<jats:sub>36<\/jats:sub>Cl<jats:sub>4<\/jats:sub>N<jats:sub>4<\/jats:sub>O<jats:sub>4<\/jats:sub>S<jats:sub>4<\/jats:sub>\u00b7CHCl<jats:sub>3<\/jats:sub>, whose X-ray structure is described herein, has cofacial quinoxaline rings with bithiophene rings attached on opposite sides. The molecular structure is approximately C-shaped and consists of an aliphatic spacer with a boat-shaped cyclohexane ring in the middle. The centroid-to-centroid distance between the quinoxaline rings is 3.950\u2005(1)\u2005\u00c5, with ring-offset distances of 0.354\u2005(3) and 0.816\u2005(2)\u2005\u00c5. The pendant bithiophene rings are oriented parallel to one another, which results from the thiophene rings connected to the quinoxaline rings being oriented such that their S atoms are rotated inward toward one another, but are not overlapped. Intermolecular packing is largely governed by van der Waals forces and a few weak C\u2014H...<jats:italic>X<\/jats:italic> (<jats:italic>X<\/jats:italic> = N or O) interactions.<\/jats:p>","DOI":"10.1107\/s2053229617001991","type":"journal-article","created":{"date-parts":[[2017,2,13]],"date-time":"2017-02-13T13:07:21Z","timestamp":1486991241000},"page":"276-279","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":0,"title":["Crystal structure of a fluorescent C-shaped molecule containing closely stacked bithiophene-substituted quinoxaline rings"],"prefix":"10.1107","volume":"73","author":[{"given":"Laura M.","family":"Wickham","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joseph M.","family":"Tanski","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jocelyn M.","family":"Nadeau","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2017,2,13]]},"reference":[{"key":"fn3230_bb1","doi-asserted-by":"crossref","first-page":"12111","DOI":"10.1021\/jp2070419","volume":"115","author":"Alamiry","year":"2011","journal-title":"J. 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