{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,18]],"date-time":"2025-12-18T19:43:53Z","timestamp":1766087033314,"version":"3.32.0"},"reference-count":24,"publisher":"International Union of Crystallography (IUCr)","issue":"6","license":[{"start":{"date-parts":[[2015,5,16]],"date-time":"2015-05-16T00:00:00Z","timestamp":1431734400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/journals.iucr.org\/services\/copyrightpolicy.html"},{"start":{"date-parts":[[2015,5,16]],"date-time":"2015-05-16T00:00:00Z","timestamp":1431734400000},"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":[[2015,6,1]]},"abstract":"<jats:p>Triphenyl(2,4,5-trimethoxybenzyl)phosphonium chloride is formed in solvent-free form by the reaction under anhydrous conditions between triphenylphosphane and 2,4,5-trimethoxybenzyl chloride, but when it is crystallized from a mixture of ethyl acetate and chloroform in the presence of air it forms a stoichiometric monohydrate, C<jats:sub>28<\/jats:sub>H<jats:sub>28<\/jats:sub>O<jats:sub>3<\/jats:sub>P<jats:sup>+<\/jats:sup>\u00b7Cl<jats:sup>\u2212<\/jats:sup>\u00b7H<jats:sub>2<\/jats:sub>O, (I). The reactions between the anhydrous phosphonium salt and alkoxy-substituted benzaldehydes, using Wittig reactions in the presence of potassium<jats:italic>tert<\/jats:italic>-butoxide, provide a series of multiply substituted stilbenes, most of which were assigned the<jats:italic>Z<\/jats:italic>configuration on the basis of their NMR spectra. However, no such deduction could be made for the symmetrically substituted (<jats:italic>Z<\/jats:italic>)-2,2\u2032,4,4\u2032,5,5\u2032-hexamethoxystilbene, C<jats:sub>20<\/jats:sub>H<jats:sub>24<\/jats:sub>O<jats:sub>6<\/jats:sub>, (II). Compound (II) does in fact have the<jats:italic>Z<\/jats:italic>configuration and the molecular geometry provides evidence for steric congestion around the central double bond; in particular, the central alkene fragment is nonplanar, with a C\u2014C=C\u2014C torsion angle of 7.8\u2005(4)\u00b0. In hydrated salt (I), the chloride anions and water molecules are linked by O\u2014H...Cl hydrogen bonds to form<jats:italic>C<\/jats:italic><jats:sub>2<\/jats:sub><jats:sup>1<\/jats:sup>(4) chains; each cation is linked by C\u2014H...O hydrogen bonds to two different chains, so forming a sheet structure. There are no direction-specific intermolecular interactions in the structure of (II).<\/jats:p>","DOI":"10.1107\/s2053229615009110","type":"journal-article","created":{"date-parts":[[2015,5,15]],"date-time":"2015-05-15T11:05:28Z","timestamp":1431687928000},"page":"479-484","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":2,"title":["A sterically congested<i>cis<\/i>-stilbene and its phosphonium salt precursor"],"prefix":"10.1107","volume":"71","author":[{"given":"Shivanna","family":"Shivaprakash","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"G. 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