Encapsulation of the platinum and neighboring metals within cluster iodides of rare-earth elements
- Iowa State Univ., Ames (USA)
Syntheses of new cluster phases containing encapsulated heterometals have been explored through reactions between the rare-earth metal Y, Pr, or Gd (R), RI{sub 3}, and a 3d, 4d, or 5d element (Z) at 750-1,000{degree}C in sealed Nb containers. New Pr{sub 7}I{sub 12}Z (SC{sub 7}Cl{sub 12}N-type) phases are obtained for Z = Cu, Ru, Rh, Pd, Re, Os, Ir, and Pt. New Gd{sub 7}I{sub 12}Z phases occur for Z = Ni, Cu, Ru, Rh, Pd, Os, Ir, Pt, and Au. In contrast, new Y{sub 6}I{sub 10}Z analogues of the previously reported Y{sub 6}I{sub 10}Ru occur with Z = Co, Ni, Rh, Os, Ir, and Pt and as Pr{sub 6}I{sub 10}Os. Crystal structures are reported. The sizable tetragonal compression observed earlier in the Y{sub 6}I{sub 10}Ru cluster and thought to be electronically driven is only 44% as great in the isoelectronic Os phase and is virtually absent in Y{sub 6}I{sub 10}Ir. Relativistic effects may be important in the bonding of the 5d interstitials. Unsuccessful syntheses, orbital populations in the various clusters, volume changes seen among the R{sub 7}I{sub 12}Z phases, and matrix effects in intercluster bonding are also discussed and interrelated. 27 refs., 2 figs., 6 tabs.
- OSTI ID:
- 6519342
- Journal Information:
- Inorganic Chemistry; (USA), Journal Name: Inorganic Chemistry; (USA) Vol. 29:12; ISSN 0020-1669; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
COMPLEXES
CRYSTAL STRUCTURE
DATA
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
INFORMATION
IODIDES
IODINE COMPOUNDS
NUMERICAL DATA
PLATINUM COMPLEXES
RARE EARTH COMPOUNDS
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS