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• W2324659506 abstract "A trinuclear nickel complex of phenanthrene-9,10-dione dioxime (H 2 pqd), namely bis[μ 2 -9,10-bis(oxidoimino)phenanthrene]bis[μ 2 -10-(oxidoimino)phenanthrene-9-one oxime](phenanthrene-9,10-dione dioxime)trinickel(II) toluene disolvate, [Ni 3 (C 14 H 8 N 2 O 2 ) 2 (C 14 H 9 N 2 O 2 ) 2 (C 14 H 10 N 2 O 2 )]·2C 7 H 8 , has been isolated and its crystal structure determined. This complex features three independent Ni II atoms that are arranged in a triangular fashion along with five supporting ligands. There are two square-planar Ni II atoms and a third pseudo-octahedral Ni II atom. While the square-planar Ni II atoms are stacked, there are no ligand bridges between them. Each square-planar Ni II atom, however, bridges with the pseudo-octahedral Ni II atom through Ni—N—O—Ni and Ni—O—Ni bonds. A fluoridoboration reaction of the proton-bridged species gave the analogous complex bis(μ 2 -bis{[10-(oxidoimino)-9,10-dihydrophenanthren-9-ylidene]amino}difluoridoborato)(phenanthrene-9,10-dione dioxime)trinickel(II) dichloromethane trisolvate, [Ni 3 (C 28 H 16 BF 2 N 4 O 2 ) 4 (C 14 H 10 N 2 O 2 )]·3CH 2 Cl 2 , which shows the same binding structure, but features a widened Ni—Ni interaction between the square-planar Ni II atoms. The proton-bridged complex completes the macrocyclic coordination around the square-planar Ni II atoms by means of an O—H...O hydrogen bond. Both compounds feature O—H...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 π-stacking interactions between adjacent molecules are found: one with a centroid–centroid distance of 3.886 (2) Å and the other with a centroid–centroid distance of 4.256 (3) Å. 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 (3) Å. Toluene molecules occupy the solvent channels that are oriented along the c axis. In the fluoridoboronate structure, the solvent (DCM) was too badly disordered to be modelled, so its contribution was removed using SQUEEZE [Spek (2015). Acta Cryst. C 71 , 9–18]." @default.
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• W2324659506 date "2016-03-24" @default.
• W2324659506 modified "2023-09-27" @default.
• W2324659506 title "Trinuclear nickel coordination complexes of phenanthrene-9,10-dione dioxime" @default.
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• W2324659506 doi "https://doi.org/10.1107/s2056989016004023" @default.
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