New Aryltellurenyl Iodides with Uncommon Valences: Synthetic and Structural Characteristics of [RTeTeI₂R], [R₂TeTeR₂][Te₄I₁₄], and [RTe(I)I₂] (R = 2,6-Dimethoxyphenyl)

Abstract

(RTe)(2) (R = 2,6-dimethoxyphenyl) reacted with iodine to give [RTeTeI(2)R] (1), [R(2)TeTeR(2)][Te(4)I(14)] (2), and [RTe(I)I(2)] (3). The synthesis of the mixed-valent, neutral complex 1 occurred easily through the reaction of (RTe)(2) with mesTeI (mes = 2,4,6-trimethylphenyl), which proved the ability of mesTeI to act as a selective oxidation reagent. In the cationic species [R(2)TeTeR(2)](2+) as well in the counterion [Te(4)I(14)](2-) of compound 2, tellurium occurs in the rare oxidation state 3+.