The Elusive closo-Ge₁₀²⁻ Zintl Ion: Finally “Captured” as a Ligand in the Complex [Ge₁₀Mn(CO)₄]³⁻

Although often seen in mass spectra, the otherwise elusive closo-Ge₁₀²⁻ Zintl ion has been finally structurally characterized as coordinated to manganese in [Ge₁₀Mn(CO)₄]³⁻ made by the reaction of nido-Ge₉⁴⁻ with Mn₂(CO)₁₀ in ethylenediamine. The new cluster is a bicapped square antiprism, as expected for a closo-deltahedron of 10 atoms.