[(Te2)3{Mn(CO)3}2{Mn(CO)4}3]– – A Novel Tellurium‐­Manganese Carbonyl with Ufosane‐like Structure

By reacting Mn₂(CO)₁₀ and TeI₄ in the ionic liquid[BMIm][OTf] (1‐butyl‐3‐methylimidazolium trifluromethanesulfonate), brick‐red crystals of [BMIm][(Te₂)₃{Mn(CO)₃}₂{Mn(CO)₄}₃]are obtained. The title compound contains the carbonyl anion[(Te₂)₃{Mn(CO)₃}₂{Mn(CO)₄}₃]^–. Herein, three formal Te₂^2– units and two formal Mn(CO)₃⁺ fragments establish a distorted heterocubane‐like Te₆Mn₂ structure. Three edges of this heterocubane are furthermore capped by Mn(CO)₄⁺ fragments. The resulting Te₆Mn₅ building unit, moreover, looks very similar to the P₁₁^3– anion – the so‐called ufosane. The mean distances Te–Te and Te–Mn are observed with 277.6 and 264.7 pm, respectively. In addition to single‐crystal structure analysis, the title compound is characterized by infrared spectroscopy (FT‐IR), thermogravimetry (TG) and energy‐dispersive X‐ray (EDX) analysis.