NbTe4I und TaTe4I, zwei neue Tellurid‐Iodide mit Kettenstruktur

NbTe4I and TaTe4I, Two New Telluride Iodides with Chain Structure NbTe4I and TaTe4I, are synthesized in almost quantitative yields by reaction of the elements in the appropriate ratio at 540°C and 480°C, respectively. The crystal structure determinations show that both structures are built up from quasi one‐dimensional Nb(Te2)2 and Ta(Te2)2 chains that are separated by isolated iodine atoms. The metal–metal distances within these chains are outside the metal–metal bonding range. Both compounds are formally described as (Nb5+)(Te22−)2(I−) and (Ta5+)(Te2−2)2(I−), and semiconducting properties must be assumed. Short Te‐I contacts between Te atoms of and I atoms between the chains indicate significant anion‐cation charge transfer.