Encapsulation of the platinum and neighboring metals within cluster iodides of rare-earth elements

Journal Article · Wed Jun 13 00:00:00 EDT 1990 · Inorganic Chemistry; (USA)

DOI:https://doi.org/10.1021/ic00337a014· OSTI ID:6519342

Payne, M W; Corbett, J D ^[1]

---

1. 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), Vol. 29:12; ISSN 0020-1669
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
IODIDES
SYNTHESIS
PLATINUM COMPLEXES
RARE EARTH COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
CRYSTAL STRUCTURE
EXPERIMENTAL DATA
COMPLEXES
DATA
HALIDES
HALOGEN COMPOUNDS
INFORMATION
IODINE COMPOUNDS
NUMERICAL DATA
TRANSITION ELEMENT COMPLEXES
400201* - Chemical & Physicochemical Properties