{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T21:49:18Z","timestamp":1740174558658,"version":"3.37.3"},"reference-count":46,"publisher":"International Union of Crystallography (IUCr)","issue":"3","license":[{"start":{"date-parts":[[2021,2,19]],"date-time":"2021-02-19T00:00:00Z","timestamp":1613692800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"},{"start":{"date-parts":[[2021,2,19]],"date-time":"2021-02-19T00:00:00Z","timestamp":1613692800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"}],"funder":[{"name":"West Professorship, Louisiana State University"},{"DOI":"10.13039\/100006952","name":"Louisiana Board of Regents","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100006952","id-type":"DOI","asserted-by":"publisher"}]}],"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":[[2021,2,2]]},"published-print":{"date-parts":[[2021,3,1]]},"abstract":"<jats:p>A copper(II) complex, (2,2\u2032-bipyridine-\u03ba<jats:sup>2<\/jats:sup>\n                  <jats:italic>N<\/jats:italic>,<jats:italic>N<\/jats:italic>\u2032)[2-hydroxy-2-(hydroxymethyl-\u03ba<jats:italic>O<\/jats:italic>)propanedioato-\u03ba<jats:sup>2<\/jats:sup>\n                  <jats:italic>O<\/jats:italic>\n                  <jats:sup>1<\/jats:sup>,<jats:italic>O<\/jats:italic>\n                  <jats:sup>3<\/jats:sup>]copper(II), [Cu(C<jats:sub>4<\/jats:sub>H<jats:sub>4<\/jats:sub>O<jats:sub>6<\/jats:sub>)(C<jats:sub>10<\/jats:sub>H<jats:sub>8<\/jats:sub>N<jats:sub>2<\/jats:sub>)], containing the unusual anionic chelating ligand 2-(hydroxymethyl)tartronate, has been synthesized. [Cu(bpy)<jats:sub>2<\/jats:sub>(NO<jats:sub>3<\/jats:sub>)](NO<jats:sub>3<\/jats:sub>) was mixed with ascorbic acid and Dabco (1,4-diazabicyclo[2.2.2]octane) in DMF (dimethylformamide) solution in the presence of air to produce the title compound. The structure consists of square-pyramidal complexes that are joined by Cu...O contacts [2.703\u2005(2)\u2005\u00c5] into centrosymmetric dimers. The C<jats:sub>4<\/jats:sub>H<jats:sub>4<\/jats:sub>O<jats:sub>6<\/jats:sub>\n                  <jats:sup>2\u2212<\/jats:sup> ligand, which occupies three coordination sites at Cu, has previously been identified as an oxidation product of ascorbate ion.<\/jats:p>","DOI":"10.1107\/s2056989021001286","type":"journal-article","created":{"date-parts":[[2021,2,19]],"date-time":"2021-02-19T12:21:31Z","timestamp":1613737291000},"page":"282-285","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":0,"title":["A copper complex of an unusual hydroxy\u2013carboxylate ligand: [Cu(bpy)(C<sub>4<\/sub>H<sub>4<\/sub>O<sub>6<\/sub>)]"],"prefix":"10.1107","volume":"77","author":[{"given":"Sen","family":"Gao","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5544-2779","authenticated-orcid":true,"given":"Frank R.","family":"Fronczek","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrew W.","family":"Maverick","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2021,2,19]]},"reference":[{"key":"pk2655_bb1","doi-asserted-by":"crossref","first-page":"2319","DOI":"10.1039\/DT9840002319","author":"Antolini","year":"1984","journal-title":"J. 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