{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T01:11:16Z","timestamp":1760058676990,"version":"build-2065373602"},"reference-count":70,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2025,4,18]],"date-time":"2025-04-18T00:00:00Z","timestamp":1744934400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"University of Patras","award":["UID\/50006"],"award-info":[{"award-number":["UID\/50006"]}]},{"name":"FCT\/MECI, Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia and Minist\u00e9rio da Educa\u00e7\u00e3o, Ci\u00eancia e Inova\u00e7\u00e3o","award":["UID\/50006"],"award-info":[{"award-number":["UID\/50006"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Magnetochemistry"],"abstract":"<jats:p>The reaction of CuCl2\u22192H2O, (E)-2-hydroxy-1,2-di(pyridin-2-yl)ethanone oxime (\u03b1-pyroxH2) and Et3N in refluxing MeOH gave complex [Cu12Cl12(mpydol)4(pydox)2(MeOH)4] (1), where mpydol2\u2212 is the dianion of 1,2-dimethoxy-1,2-di(pyridin-2-yl)ethane-1,2-diol and pydox2\u2212 is the dianion of (E,E)-1,2-di(pyridin-2-yl)ethanedione dioxime. \u201cBlind\u201d experiments have proven that the transformation of \u03b1-pyroxH2 is copper(II)-assisted. By changing the solvent from MeOH to MeCN, the polymeric compound {[Cu4Cl4(pic)4]}n (2) was isolated; pic\u2212 is the pyridine-2-carboxylato(-1) ligand. The observed \u03b1-pyroxH2 \u2192 pic\u2212 transformation is also copper(II)-assisted. The topology of the metal ions in 1 can be described as consisting of four consecutive isosceles triangles in a zigzag configuration. Complex 2 is a 2D coordination polymer consisting of CuII4 squares. Complete mechanistic views for the \u03b1-pyroxH2 \u2192 mpydol2\u2212, pydox2\u2212 and pic\u2212 transformations are critically discussed. In 1, the six CuII ions of the \u201ccentral\u201d triangles seem to be strongly antiferromagnetically coupled, thus cancelling out their spins (SCu6 = 0). The two local spins of S = 1\/2 for each of the antiferromagnetically coupled \u201cterminal\u201d CuII3 triangles result in an overall S = 1 ground state spin value for 1. In 2, the four CuII ions within each tetrameric unit are practically isolated and ferromagnetic interactions occur between these units through CuII\u2013(\u03bc-Cl)\u2013CuII bridges.<\/jats:p>","DOI":"10.3390\/magnetochemistry11040035","type":"journal-article","created":{"date-parts":[[2025,4,18]],"date-time":"2025-04-18T06:23:56Z","timestamp":1744957436000},"page":"35","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Copper(II)-Promoted Reactions of \u03b1-Pyridoin Oxime: A Dodecanuclear Cluster and a 2D Coordination Polymer"],"prefix":"10.3390","volume":"11","author":[{"given":"Konstantina H.","family":"Baka","sequence":"first","affiliation":[{"name":"Department of Chemistry, University of Patras, 26504 Patras, Greece"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9229-1412","authenticated-orcid":false,"given":"Lu\u00eds","family":"Cunha-Silva","sequence":"additional","affiliation":[{"name":"LAQV\/REQUIMTE & Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8775-5427","authenticated-orcid":false,"given":"Catherine P.","family":"Raptopoulou","sequence":"additional","affiliation":[{"name":"Institute of Nanoscience and Nanotechnology, NCSR \u201cDemokritos\u201d, 15310 Aghia Paraskevi Attikis, Greece"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1280-3199","authenticated-orcid":false,"given":"Vassilis","family":"Psycharis","sequence":"additional","affiliation":[{"name":"Institute of Nanoscience and Nanotechnology, NCSR \u201cDemokritos\u201d, 15310 Aghia Paraskevi Attikis, Greece"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5845-4134","authenticated-orcid":false,"given":"Dionissios","family":"Papaioannou","sequence":"additional","affiliation":[{"name":"Department of Chemistry, University of Patras, 26504 Patras, Greece"}]},{"given":"Mark M.","family":"Turnbull","sequence":"additional","affiliation":[{"name":"Carlson School of Chemistry and Biochemistry, Clark University, 950 Main St., Worcester, MA 01610, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0985-2579","authenticated-orcid":false,"given":"Zoi G.","family":"Lada","sequence":"additional","affiliation":[{"name":"Department of Chemistry, University of Patras, 26504 Patras, Greece"}]},{"given":"Spyros P.","family":"Perlepes","sequence":"additional","affiliation":[{"name":"Department of Chemistry, University of Patras, 26504 Patras, Greece"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9798-9331","authenticated-orcid":false,"given":"Theocharis C.","family":"Stamatatos","sequence":"additional","affiliation":[{"name":"Department of Chemistry, University of Patras, 26504 Patras, Greece"}]}],"member":"1968","published-online":{"date-parts":[[2025,4,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1016\/S0065-2725(08)60285-8","article-title":"Reactions of Coordinated Ligands","volume":"58","author":"Blackman","year":"1993","journal-title":"Adv. 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