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The <jats:sup>1<\/jats:sup>H, <jats:sup>13<\/jats:sup>C, and <jats:sup>15<\/jats:sup>N NMR data exhibit that on standing in chloroform\u2010d solution, there is a spontaneous isomerization of this compound resulting in a thermodynamically stable mixture of the <jats:italic>ZZ<\/jats:italic>, <jats:italic>ZE<\/jats:italic>, <jats:italic>EE<\/jats:italic>, and <jats:italic>EZ<\/jats:italic> isomers with the same backbone. Using the 2D [<jats:sup>1<\/jats:sup>H\u2013<jats:sup>1<\/jats:sup>H] COSY, [<jats:sup>1<\/jats:sup>H\u2013<jats:sup>13<\/jats:sup>C] HSQC, and [<jats:sup>1<\/jats:sup>H\u2013<jats:sup>13<\/jats:sup>C, <jats:sup>1<\/jats:sup>H\u2013<jats:sup>15<\/jats:sup>N] HMBC NMR techniques and quantum chemical calculations makes it possible a complete assignment of signals in the <jats:sup>1<\/jats:sup>H, <jats:sup>13<\/jats:sup>C, and <jats:sup>15<\/jats:sup>N NMR spectra of each of the isomers. Such isomerization does not occur for similar compounds with the more bulky substituents at the 1,3\u2010oxazolidine rings. Copyright \u00a9 2016 John Wiley &amp; Sons, Ltd.<\/jats:p>","DOI":"10.1002\/mrc.4551","type":"journal-article","created":{"date-parts":[[2016,11,10]],"date-time":"2016-11-10T03:46:08Z","timestamp":1478749568000},"page":"563-569","source":"Crossref","is-referenced-by-count":8,"title":["Study of spontaneous <i>E<\/i>\/<i>Z<\/i> isomerization of bis[(<i>Z<\/i>)\u2010cyanomethylidene]\u2010diazapentacyclodienedicarboxylates by <sup>1<\/sup>H, <sup>13<\/sup>C, and <sup>15<\/sup>N NMR spectroscopy, X\u2010ray, and quantum chemical calculation data"],"prefix":"10.1002","volume":"55","author":[{"given":"Andrei V.","family":"Afonin","sequence":"first","affiliation":[{"name":"A. E. 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