{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,1,14]],"date-time":"2025-01-14T05:17:16Z","timestamp":1736831836515,"version":"3.33.0"},"reference-count":16,"publisher":"International Union of Crystallography (IUCr)","issue":"4","license":[{"start":{"date-parts":[[2016,3,24]],"date-time":"2016-03-24T00:00:00Z","timestamp":1458777600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/2.0\/uk\/legalcode"},{"start":{"date-parts":[[2016,3,24]],"date-time":"2016-03-24T00:00:00Z","timestamp":1458777600000},"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":[[2016,4,1]]},"abstract":"<jats:p>A trinuclear nickel complex of phenanthrene-9,10-dione dioxime (H<jats:sub>2<\/jats:sub>pqd), namely bis[\u03bc<jats:sub>2<\/jats:sub>-9,10-bis(oxidoimino)phenanthrene]bis[\u03bc<jats:sub>2<\/jats:sub>-10-(oxidoimino)phenanthrene-9-one oxime](phenanthrene-9,10-dione dioxime)trinickel(II) toluene disolvate, [Ni<jats:sub>3<\/jats:sub>(C<jats:sub>14<\/jats:sub>H<jats:sub>8<\/jats:sub>N<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub>)<jats:sub>2<\/jats:sub>(C<jats:sub>14<\/jats:sub>H<jats:sub>9<\/jats:sub>N<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub>)<jats:sub>2<\/jats:sub>(C<jats:sub>14<\/jats:sub>H<jats:sub>10<\/jats:sub>N<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub>)]\u00b72C<jats:sub>7<\/jats:sub>H<jats:sub>8<\/jats:sub>, has been isolated and its crystal structure determined. This complex features three independent Ni<jats:sup>II<\/jats:sup>atoms that are arranged in a triangular fashion along with five supporting ligands. There are two square-planar Ni<jats:sup>II<\/jats:sup>atoms and a third pseudo-octahedral Ni<jats:sup>II<\/jats:sup>atom. While the square-planar Ni<jats:sup>II<\/jats:sup>atoms are stacked, there are no ligand bridges between them. Each square-planar Ni<jats:sup>II<\/jats:sup>atom, however, bridges with the pseudo-octahedral Ni<jats:sup>II<\/jats:sup>atom through Ni\u2014N\u2014O\u2014Ni and Ni\u2014O\u2014Ni bonds. A fluoridoboration reaction of the proton-bridged species gave the analogous complex bis(\u03bc<jats:sub>2<\/jats:sub>-bis{[10-(oxidoimino)-9,10-dihydrophenanthren-9-ylidene]amino}difluoridoborato)(phenanthrene-9,10-dione dioxime)trinickel(II) dichloromethane trisolvate, [Ni<jats:sub>3<\/jats:sub>(C<jats:sub>28<\/jats:sub>H<jats:sub>16<\/jats:sub>BF<jats:sub>2<\/jats:sub>N<jats:sub>4<\/jats:sub>O<jats:sub>2<\/jats:sub>)<jats:sub>4<\/jats:sub>(C<jats:sub>14<\/jats:sub>H<jats:sub>10<\/jats:sub>N<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub>)]\u00b73CH<jats:sub>2<\/jats:sub>Cl<jats:sub>2<\/jats:sub>, which shows the same binding structure, but features a widened Ni\u2014Ni interaction between the square-planar Ni<jats:sup>II<\/jats:sup>atoms. The proton-bridged complex completes the macrocyclic coordination around the square-planar Ni<jats:sup>II<\/jats:sup>atoms by means of an O\u2014H...O hydrogen bond. Both compounds feature O\u2014H...N hydrogen bonds between the oxime and the N atoms attached to square-planar nickel atom. The nickel units show no direct interaction with their nearest neighbors in the extended lattice. Two \u03c0-stacking interactions between adjacent molecules are found: one with a centroid\u2013centroid distance of 3.886\u2005(2)\u2005\u00c5 and the other with a centroid\u2013centroid distance of 4.256\u2005(3)\u2005\u00c5. In the latter case, although not aromatic, the distance to the centroid of the central phenanthrene ring is shorter, with a distance of 3.528\u2005(3)\u2005\u00c5. Toluene molecules occupy the solvent channels that are oriented along the<jats:italic>c<\/jats:italic>axis. In the fluoridoboronate structure, the solvent (DCM) was too badly disordered to be modelled, so its contribution was removed using SQUEEZE [Spek (2015).<jats:italic>Acta Cryst.<\/jats:italic>C<jats:bold>71<\/jats:bold>, 9\u201318].<\/jats:p>","DOI":"10.1107\/s2056989016004023","type":"journal-article","created":{"date-parts":[[2016,3,24]],"date-time":"2016-03-24T09:59:12Z","timestamp":1458813552000},"page":"538-542","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":0,"title":["Trinuclear nickel coordination complexes of phenanthrene-9,10-dione dioxime"],"prefix":"10.1107","volume":"72","author":[{"given":"Owen M.","family":"Williams","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alan H.","family":"Cowley","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"329","published-online":{"date-parts":[[2016,3,24]]},"reference":[{"unstructured":"Agilent (2014). 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