{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T08:55:17Z","timestamp":1790844917067,"version":"4.1.0"},"reference-count":26,"publisher":"International Union of Crystallography (IUCr)","issue":"7","license":[{"start":{"date-parts":[[2019,6,11]],"date-time":"2019-06-11T00:00:00Z","timestamp":1560211200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"},{"start":{"date-parts":[[2019,6,11]],"date-time":"2019-06-11T00:00:00Z","timestamp":1560211200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/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"],"accepted":{"date-parts":[[2019,6,4]]},"published-print":{"date-parts":[[2019,7,1]]},"abstract":"<jats:p>Typical electroless copper baths (ECBs), which are used to chemically deposit copper on printed circuit boards, consist of an aqueous alkali hydroxide solution, a copper(II) salt, formaldehyde as reducing agent, an L-(+)-tartrate as complexing agent, and a 2,2\u2032-bipyridine derivative as stabilizer. Actual speciation and reactivity are, however, largely unknown. Herein, we report on the synthesis and crystal structure of aqua-1\u03ba<jats:italic>O<\/jats:italic>-bis(4,4\u2032-dimethoxy-2,2\u2032-bipyridine)-1\u03ba<jats:sup>2<\/jats:sup>\n                  <jats:italic>N<\/jats:italic>,<jats:italic>N\u2032<\/jats:italic>;2\u03ba<jats:sup>2<\/jats:sup>\n                  <jats:italic>N<\/jats:italic>,<jats:italic>N\u2032<\/jats:italic>-[\u03bc-(2<jats:italic>R<\/jats:italic>,3<jats:italic>R<\/jats:italic>)-2,3-dioxidosuccinato-1\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>2<\/jats:sup>:2\u03ba<jats:sup>2<\/jats:sup>\n                  <jats:italic>O<\/jats:italic>\n                  <jats:sup>3<\/jats:sup>,<jats:italic>O<\/jats:italic>\n                  <jats:sup>4<\/jats:sup>]dicopper(II) octahydrate, [Cu<jats:sub>2<\/jats:sub>(C<jats:sub>12<\/jats:sub>H<jats:sub>12<\/jats:sub>N<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub>)<jats:sub>2<\/jats:sub>(C<jats:sub>4<\/jats:sub>H<jats:sub>2<\/jats:sub>O<jats:sub>6<\/jats:sub>)(H<jats:sub>2<\/jats:sub>O)]\u00b78H<jats:sub>2<\/jats:sub>O, from an ECB mock-up. The title compound crystallizes in the Sohncke group <jats:italic>P<\/jats:italic>2<jats:sub>1<\/jats:sub> with one chiral dinuclear complex and eight molecules of hydrate water in the asymmetric unit. The expected retention of the tartrato ligand's absolute configuration was confirmed <jats:italic>via<\/jats:italic> determination of the absolute structure. The complex molecules exhibit an ansa-like structure with two planar, nearly parallel bipyridine ligands, each bound to a copper atom that is connected to the other by a bridging tartrato `handle'. The complex and water molecules give rise to a layered supramolecular structure dominated by alternating \u03c0 stacks and hydrogen bonds. The understanding of structures <jats:italic>ex situ<\/jats:italic> is a first step on the way to prolonged stability and improved coating behavior of ECBs.<\/jats:p>","DOI":"10.1107\/s2056989019008053","type":"journal-article","created":{"date-parts":[[2019,6,11]],"date-time":"2019-06-11T08:22:44Z","timestamp":1560241364000},"page":"972-975","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":1,"title":["Synthesis, characterization, and crystal structure of aquabis(4,4\u2032-dimethoxy-2,2\u2032-bipyridine)[\u03bc-(2<i>R<\/i>,3<i>R<\/i>)-tartrato(4\u2212)]dicopper(II) octahydrate"],"prefix":"10.1107","volume":"75","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6294-3205","authenticated-orcid":true,"given":"Dennis","family":"Wiedemann","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roman-David","family":"Kulko","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andreas","family":"Grohmann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"329","published-online":{"date-parts":[[2019,6,11]]},"reference":[{"key":"zq2247_bb1","unstructured":"Agens, M. 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