Tl8]6− in Cs8Tl8O: A Naked Eight‐Vertex closo‐Deltaeder as a Cluster Anion

Abstract

Structures to count on: The title compound crystallizes in a unique crystal-structure type which can be regarded as a rock-salt derivative composed of a suboxide group [OCs6+2]6+ (yellow) and a novel thallium cluster [Tl8]6− (blue). The valence electron count of the eight-vertex cluster obeys the Wade–Mingos condensation rules when considering it as a condensation of an octahedron with two tetrahedra.