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@ARTICLE{Fielden:12998,
author = {Fielden, J. and Ellern, A. and Kögerler, P.},
title = {[{C}r8({P}h{CO}2)1604].4{CH}3{CN}.2{H}2{O}: {S}tructural
origin of magnetic anisotropy in a molecular spin cluster},
journal = {Acta crystallographica / C},
volume = {66},
issn = {0108-2701},
address = {Oxford},
publisher = {Wiley-Blackwell},
reportid = {PreJuSER-12998},
pages = {253 - 256},
year = {2010},
note = {Record converted from VDB: 12.11.2012},
abstract = {The Cr(4)O(4) hetero-cubane-centered octachromium(III)
cluster [Cr(8)(PhCO(2))(16)O(4)] crystallizes from
fluorobenzene-acetonitrile as
dodeca-mu(2)-benzoato-tetrabenzoatotetra-mu(4)-oxido-octachromium(III)
acetonitrile tetrasolvate dihydrate,
[Cr(8)(C(7)H(5)O(2))(16)O(4)].4C(2)H(3)N.2H(2)O, (I).
Crystals produced by this method are significantly more
stable than the originally published dichloromethane
pentasolvate, [Cr(8)(PhCO(2))(16)O(4)].5CH(2)Cl(2) [Atkinson
et al. (1999). Chem. Commun. pp. 285-286], leading to a
significantly higher quality structure and allowing the
production of large quantities of high-quality nondeuterated
and deuterated material suitable for inelastic neutron
scattering (INS) measurements. Compound (I) reveals a higher
symmetry structure in which the cluster sits on a twofold
rotation axis, and is based on an asymmetric unit containing
four crystallographically independent Cr positions, two
oxide ligands, eight benzoate ligands, two acetonitrile
solvent molecules and one disordered water molecule. All the
Cr atoms are six-coordinate, with an octahedral geometry for
the inner cubane and a more highly distorted coordination
environment in the outer positions. Despite the higher
symmetry, the coordination geometries observed in (I) are
largely similar to the dichloromethane pentasolvate
structure, indicating that crystal-packing effects have
little influence on the molecular structure of
[Cr(8)(PhCO(2))(16)O(4)]. Close structural analysis reveals
that the high magnetic anisotropy observed in the INS
measurements is a consequence of the distorted coordination
geometry of the four outer Cr atoms.},
keywords = {J (WoSType)},
cin = {IFF-9},
ddc = {540},
cid = {I:(DE-Juel1)VDB789},
pnm = {Grundlagen für zukünftige Informationstechnologien},
pid = {G:(DE-Juel1)FUEK412},
shelfmark = {Crystallography},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:20814097},
UT = {WOS:000281635400008},
doi = {10.1107/S0108270110032683},
url = {https://juser.fz-juelich.de/record/12998},
}