{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,6]],"date-time":"2025-11-06T11:42:21Z","timestamp":1762429341132,"version":"3.37.3"},"reference-count":40,"publisher":"International Union of Crystallography (IUCr)","issue":"11","license":[{"start":{"date-parts":[[2018,10,9]],"date-time":"2018-10-09T00:00:00Z","timestamp":1539043200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/2.0\/uk\/legalcode"},{"start":{"date-parts":[[2018,10,9]],"date-time":"2018-10-09T00:00:00Z","timestamp":1539043200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/2.0\/uk\/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"],"published-print":{"date-parts":[[2018,11,1]]},"abstract":"<jats:p>The crystal structures of four (<jats:italic>E<\/jats:italic>)-methoxybenzaldehyde oxime derivatives, namely (2-methoxybenzaldehyde oxime,<jats:bold>1<\/jats:bold>, 2,3-dimethoxybenzaldehyde oxime,<jats:bold>2<\/jats:bold>, 4-dimethoxybenzaldehyde oxime,<jats:bold>3<\/jats:bold>, and 2,5-dimethoxybenzaldehyde oxime,<jats:bold>4<\/jats:bold>, are discussed. The arrangements of the 2-methoxy group and the H atom of the oxime unit are<jats:italic>s-cis<\/jats:italic>in compounds<jats:bold>1<\/jats:bold>\u2013<jats:bold>3<\/jats:bold>, but in both independent molecules of compound<jats:bold>4<\/jats:bold>, the arrangements are<jats:italic>s-trans<\/jats:italic>. There is also a difference in the conformation of the two molecules in<jats:bold>4<\/jats:bold>, involving the orientations of the 2- and 5-methoxy groups. The primary intermolecular O\u2014H(oxime)...O(hydroxy) hydrogen bonds generate<jats:italic>C<\/jats:italic>(3) chains in<jats:bold>1<\/jats:bold>and<jats:bold>2<\/jats:bold>. In contrast, in compound<jats:bold>3<\/jats:bold>, the O\u2014H(oxime)...O(hydroxy) hydrogen bonds generate symmetric<jats:italic>R<\/jats:italic><jats:sub>2<\/jats:sub><jats:sup>2<\/jats:sup>(6) dimers. A more complex dimer is generated in<jats:bold>4<\/jats:bold>from the O\u2014H(oxime)...O(hydroxy) and C\u2014H(2-methoxy)...O(hydroxy) hydrogen bonds. In all cases, further interactions, C\u2014H...O and C\u2014H...\u03c0 or \u03c0\u2013\u03c0, generate three-dimensional arrays. Hirshfeld surface and fingerprint analyses are discussed.<\/jats:p>","DOI":"10.1107\/s2056989018014020","type":"journal-article","created":{"date-parts":[[2018,10,9]],"date-time":"2018-10-09T08:35:21Z","timestamp":1539074121000},"page":"1553-1560","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":1,"title":["Crystal structures and Hirshfeld surfaces of four methoxybenzaldehyde oxime derivatives, 2-MeO-<i>X<\/i>C<sub>6<\/sub>H<sub>3<\/sub>C=NOH (<i>X<\/i>= H and 2-, 3- and 4-MeO): different conformations and hydrogen-bonding patterns"],"prefix":"10.1107","volume":"74","author":[{"given":"Ligia R.","family":"Gomes","sequence":"first","affiliation":[]},{"given":"Marcus V. 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