Bruehmann, Matthias, Mudring, Anja-Verena, Valldor, Martin and Meyer, Gerd ORCID: 0000-0003-1000-9001 (2011). {Os5Lu20}I-24, the First Extended Cluster Complex of Lutetium with Eight-Coordinate Endohedral Osmium Atoms in Two Different Environments. Eur. J. Inorg. Chem. (26). S. 4083 - 4089. MALDEN: WILEY-BLACKWELL. ISSN 1434-1948

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Abstract

{Os5Lu20}I-24 was obtained from a conproportionation reaction of lutetium and lutetium triiodide in the presence of osmium in an arc-welded tantalum container at 850-1200 degrees C. The crystal structure has been determined by single-crystal X-ray diffraction analysis. Square antiprisms and cubes of lutetium atoms in a 4: 1 ratio share common square faces in a chain; they encapsulate osmium atoms and are surrounded by iodide ions. Os-Os distances within the cluster chains (299, 303, and 325 pm) imply only little if no bonding between neighbouring osmium atoms. The cluster complex chains are packed in the fashion of a hexagonal closest packing of rods. There are only van der Waals interactions between these chains as the shortest inter-chain Lu-I distances of 468 pm attest. Electronic structure calculations show mainly Os-Lu and Lu-I bonding, with lesser Lu-Lu and negligible Os-Os contributions. Remarkable is the considerable population of Lu-5d states close to the Fermi level. Susceptibility measurements show complex magnetic behavior with ferromagnetic coupling in the {Os5Lu20} chains and antiferromagnetic coupling between the chains, which results in geometric frustration. As a consequence, the spin system has a cluster-glasslike ground state.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Bruehmann, MatthiasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mudring, Anja-VerenaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Valldor, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Meyer, GerdUNSPECIFIEDorcid.org/0000-0003-1000-9001UNSPECIFIED
URN: urn:nbn:de:hbz:38-489514
DOI: 10.1002/ejic.201100451
Journal or Publication Title: Eur. J. Inorg. Chem.
Number: 26
Page Range: S. 4083 - 4089
Date: 2011
Publisher: WILEY-BLACKWELL
Place of Publication: MALDEN
ISSN: 1434-1948
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
EARTH-METAL HALIDES; REDUCED HALIDES; EXPLORATORY SYNTHESIS; SOLID-STATE; ELEMENTS; CHALCOGENIDES; LANTHANIDES; IODIDESMultiple languages
Chemistry, Inorganic & NuclearMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/48951

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