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2005
Cobalt
I 7200
25- 025
The Satellite-Shaped Co-15 Polyoxotungstate,
[Co6(H 2O) 30{Co9Cl2(OH)3(H2O)9 (β-SiW8O31)3}]5-. — Title compound (III) crystallizes in the hexagonal space group P63/m with Z = 2 (single crystal XRD). The trimeric
anion has a core of nine CoII ions encapsulated by three unprecedented β-SiW8O31 fragments and two Cl- ligands. This central assembly is surrounded by six Co(OH2)5 groups.
Results of cyclic voltammetry indicate that the polyanion of (III) keeps its integrity in
solution. Magnetic measurements show the presence of both antiferro- and ferromagnetic coupling within the Co9 core. — (BASSIL, B. S.; NELLUTLA, S.; KORTZ*, U.;
STOWE, A. C.; VAN TOL, J.; DALAL, N. S.; KEITA, B.; NADJO, L.; Inorg. Chem.
44 (2005) 8, 2659-2665; Sch. Eng. Sci., Intern. Univ. Bremen, D-28759 Bremen,
Germany; Eng.) — Schramke
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