Hexatellurium rings in coordination polymers and molecular clusters: Synthesis and crystal structures of [M(Te 6)]X 3 (M = Rh, Ir; X = Cl, Br, I) and [Ru 2(Te 6)](TeBr 3) 4(TeBr 2) 2

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

Abstract

The reaction of an electron-rich transition metal M (M = Ru, Rh, Ir), tellurium and TeX 4 (X = Cl, Br, I) resulted in black crystals of five ternary coordination polymers with the general composition [M III(Te 6)]X 3 (M = Rh, Ir) and of the molecular cluster compound [Ru II 2(Te 6)](Te IIBr 3) 4(Te IIBr 2) 2. X-ray diffraction on single-crystals revealed that the compounds [M(Te 6)]X 3 crystallize isostructurally in the trigonal space group type R$\bar{3}$c. In their crystal structures linear, positively charged [M III(Te 6)] chains form the motif of a hexagonal rod packing. In the chain, each of the formally uncharged Te 6 molecules with chair conformation acts as a bis-tridentate bridging ligand to two M atoms. The octahedrally coordinated M atoms are spiro atoms in the chain of trans vertices sharing heterocubane fragments. Including the isolated halide ions, which provide charge balance, the entire arrangement resembles a cut-out of the α-polonium structure type.In the monoclinic compound Ru 2Te 12Br 16 (space group P2 1/n), the ruthenium atoms of the hetero-cubane core of the molecular cluster [Ru 2(Te 6)](TeBr 3) 4(TeBr 2) 2 are saturated by terminal bromidotellurate(II) groups. Again, the Te 6 ring is formally uncharged. With the tellurium atoms acting as electron-pair donors the 18 electron rule is fulfilled for the M atoms in all compounds.

Details

OriginalspracheEnglisch
Seiten (von - bis)317-323
Seitenumfang7
FachzeitschriftZeitschrift fur Anorganische und Allgemeine Chemie
Jahrgang638
Ausgabenummer2
PublikationsstatusVeröffentlicht - Feb. 2012
Peer-Review-StatusJa

Externe IDs

ORCID /0000-0002-2391-6025/work/159171962

Schlagworte

ASJC Scopus Sachgebiete

Schlagwörter

  • Cluster compounds, Coordination polymers, Heterocubane, Tellurium, Transition metals