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dc.contributor.authorLampropoulos, Christosen
dc.contributor.authorStamatatos, Theocharis C.en
dc.contributor.authorManos, Manolis J.en
dc.contributor.authorTasiopoulos, Anastasios J.en
dc.contributor.authorAbboud, K. A.en
dc.contributor.authorChristou, Georgeen
dc.creatorLampropoulos, Christosen
dc.creatorStamatatos, Theocharis C.en
dc.creatorManos, Manolis J.en
dc.creatorTasiopoulos, Anastasios J.en
dc.creatorAbboud, K. A.en
dc.creatorChristou, Georgeen
dc.description.abstractThe combined use of the anion of methyl 2-pyridyl ketone oxime (mpko -) and azides (N3-) in non-carboxylate Mn chemistry has afforded two new Mn6 clusters, [Mn6O 3(N3)3(mpko)6(H2O) 3](ClO4J2 (1) and [Mn6O3(N3) 5(mpko)6(H2O)] (2), which are mixed-valence (MnII, 5 MnIII). The 1:1:1:1 reaction of Mn(C1O 4)2·6H2O, mpkoH, NaN3 and NEt3 in MeOH gave the cationic complex 1, while a similar reaction using additional NaO2CMe led instead to the neutral complex 2. The structurally unprecedented cores of the two cages are very similar, and contain the six Mn ions in a topology comprising three vertex-sharing oxide-centered triangles bridged by two end-on azides. Variable-temperature, solidstate dc and ac magnetization studies were carried out for 1 and 2 in the 1.8-300 K range. The data reveal S = 5/2 ground states for both complexes, and fitting of magnetization vs. field (H) and temperature (T) data by matrix diagonalization for 1 gave S = 5/2, D = -1.4(3) cm-1, and g = 1.99(1), where D is the axial zero-field splitting (ZFS) parameter. The combined results demonstrate the versatility of 2-pyridyl ketone oxime anions in the presence of suitable ancillary ligands, such as azides, for the synthesis of new Mn clusters, without requiring the co-presence of carboxylate ligands. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.en
dc.sourceEuropean Journal of Inorganic Chemistryen
dc.subjectMagnetic propertiesen
dc.subjectMixed-valent compoundsen
dc.subjectPolynuclear complexesen
dc.titleNew mixed-valence Mn6II/III complexes bearing oximato and azido ligands: Synthesis, and structural and magnetic characterizationen
dc.description.endingpage2253 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied SciencesΤμήμα Χημείας / Department of Chemistry
dc.description.notes<p>Cited By :11</p>en
dc.contributor.orcidTasiopoulos, Anastasios J. [0000-0002-4804-3822]
dc.contributor.orcidStamatatos, Theocharis C. [0000-0002-9798-9331]
dc.contributor.orcidLampropoulos, Christos [0000-0001-9065-1453]

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