[Tl₈]⁶⁻ in Cs₈Tl₈O – ein “nackter” achteckiger closo‐Deltaeder als Clusteranion

Abstract

Als Steinsalz‐Struktur aus einer Suboxidgruppe ([OCs6+2]6+, beige) und einem neuartigen Thalliumcluster ([Tl8]6−, blau) kann der beispiellose Kristallstrukturtyp angesehen werden, in dem die Titelverbindung kristallisiert. Die Elektronenzahl des achteckigen Clusteranions entspricht den Wade‐Mingos‐Regeln, wenn man es als das Kondensationsprodukt eines Oktaeders mit zwei Tetraedern betrachtet.

Synthesis, Crystal and Electronic Structure of the Sulfido Ferrate Oxide, Cs11[Fe5S8]2[O]

“…The distances O–Cs in these [OCs 6 ] octahedra (Figure 1, right) of 285.4 ( d ) and 303.2 pm ( e , Table 3) are close to the commonly observed values, e.g. in Cs 2 O (292 pm17) or in the similarly isolated [OCs 6 ] octahedra in Cs 8 Tl 8 O (290 pm18).…”

Endohedral Ten‐Vertex Clusters [Ga@Tl10]8− in the Mixed Trielides A8GaTl10 (A=K, Rb, Cs)

“…The pentagonal bipyramids (pBP) or icosahedra caps [Tl 7 ] 7− in the – due to three extra electrons metallic – compound K 10 [Tl 7 ] [64] and in Na 12 K 38 [Au] 2 [Tl 7 ] 3 [Tl 9 ] 3 [65] are similarly formed by 5 T sharing one common edge and five faces. Tetrahedra stars (TS) [Tl 8 ] 6− (5 T with four common faces) are present in the oxide thallide Cs 18 [Tl 8 ][O] 6 , [67] whereas Cs 8 [Tl 8 ][O] [68] contains bicapped octahedra (2 T+1 O). The clusters [Tl 9 ] 9− , which appear in several mixed Na/K thallides (cf.…”