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dc.contributor.authorPapatriantafyllopoulou, Constantinaen
dc.contributor.authorStamatatos, Theocharis C.en
dc.contributor.authorWernsdorfer, W.en
dc.contributor.authorTeat, S. J.en
dc.contributor.authorTasiopoulos, Anastasios J.en
dc.contributor.authorEscuer, Alberten
dc.contributor.authorPerlepes, Spyros P.en
dc.creatorPapatriantafyllopoulou, Constantinaen
dc.creatorStamatatos, Theocharis C.en
dc.creatorWernsdorfer, W.en
dc.creatorTeat, S. J.en
dc.creatorTasiopoulos, Anastasios J.en
dc.creatorEscuer, Alberten
dc.creatorPerlepes, Spyros P.en
dc.description.abstractThe combined use of the anion of phenyl(2-pyridyl)ketone oxime (ppko-) and azides (N3 -) in nickel(II) carboxylate chemistry has afforded two new NiII 5clusters, [Ni5(O2CR′)2(N3)4(ppko)4(MeOH)4] [R′ = H (1), Me (2)]. The structurally unprecedented {Ni5(μ-N3)2(μ3-N3)2}6+cores of the two clusters are almost identical and contain the five NiIIatoms in a bowtie topology. Two N3 -ions are end-on doubly bridging and the other two ions end-on triply bridging. The end-on μ3-N3 -groups link the central NiIIatoms with the two peripheral metal ions on either side of the molecule, while the Ni···Ni bases of the triangles are each bridged by one end-on μ-N3 -group. Variable- temperature, solid-state direct-(dc) and alternating-current (ac) magnetic susceptibility, and magnetization studies at 2.0 K were carried out on both complexes. The data indicate an overall ferromagnetic behavior and an S = 5 ground state for both compounds. The ac susceptibility studies on 1 reveal nonzero, frequency-dependent out-of-phase (ΧM″) signals at temperatures below ∼3.5 Ken
dc.description.abstractcomplex 2 reveals no ΧM″ signals. However, single-crystal magnetization versus dc field scans at variable temperatures and variable sweep rates down to 0.04 K on 1 reveal no noticeable hysteresis loops, except very minor ones at 0.04 K assignable to weak intermolecular interactions propagated by nonclassical hydrogen bonds. © 2010 American Chemical Society.en
dc.sourceInorganic chemistryen
dc.titleCombining azide, carboxylate, and 2-pyridyloximate ligands in transition-metal chemistry: Ferromagnetic NiII 5clusters with a bowtie skeletonen
dc.description.endingpage10496 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied SciencesΤμήμα Χημείας / Department of Chemistry
dc.contributor.orcidTasiopoulos, Anastasios J. [0000-0002-4804-3822]
dc.contributor.orcidPapatriantafyllopoulou, Constantina [0000-0002-5652-7747]
dc.contributor.orcidStamatatos, Theocharis C. [0000-0002-9798-9331]

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