Uncommon assembling of organotellurium iodides: Synthesis and X-ray characterization of [mesTeI(μ-I)2(TeImes)2]n, (C5H6N)4[mesTeI2]2(I3)2 and {(C5H6N)3[(mesTeI3)(μ-I−)(TeI3mes)](I3)2}n (mes=2,4,6-trimethylphenyl)

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

“…We have investigated the ability of the mesityl group to stabilize tellurium(II) iodides as mesTeI, and the obtained results were undoubted and reproducible. 5,8 This finding aroused our interest for the possibility of using mesTeI as a selective oxidation reagent, an hypothesis that was proven also in the case of the preparation of [RTeTeI 2 R] (1; R = 2,6-dimethoxyphenyl) by the reaction of (RTe) 2 with mesTeI at room temperature (see Scheme 1). The specific mixed-valence state of 1 is also promoted by the organic substituent R (2,6-dimethoxyphenyl) because the direct reaction with I 2 can also be carried out, although under controlled conditions (-10 °C).…”

“…Unusual compositions and configurations are characteristic for these types of organyltellurenyl halides . Many structures of tellurium(II) and -(IV) iodide compounds attain secondary, interionic I 3 − ···I−Te − , N + −H···I−Te − , and N + −H···I 3 − interactions, as well as Te···I, I···I, or Te···π−aryl contacts. , Single monomers and dimers and also polymeric chains attaining 1D, 2D, and 3D networks, as well as rare polymeric structures with chalcogen atoms presenting mixed-valence states like, for example, the recently reported neutral species [mesTeI(μ-I) 2 (TeImes) 2 ] n (mes = 2,4,6-trimethylphenyl), are often described.…”

The Unique Ambiphilicity of Tellurium in the [MesitylTe(I)(I2)(I3)]−Anion

“…[27] The TeÀ I bond lengths between 2.8736(5) and 3.0543(5) Å and the CÀ TeÀ I angles between 87.0(1) and 89.7(1)°are unexceptional and fall into the ranges, which were observed for other structures containing isolated [MesTeI 2 ] À ions. [28][29][30][31][32] An ellipsoid plot of the anion of compound 1 and more details about bond lengths and angles are given in Figure 3 and Table 1 together with the values of compound 2, which is formed when a substoichiometric amount of ZnI 2 is used.…”

“…centers are bridged. [32,[34][35][36][37][38] But it should be mentioned that only one of these examples contains a single iodide bridge. [32] Having in mind the previously reported findings of Beckmann et al, that during the halogenation of diaryl ditellurides it is essential to control the stoichiometry and dynamic exchanges processes, [39] we used an excess of iodine in an additional experiment.…”

“…[32,[34][35][36][37][38] But it should be mentioned that only one of these examples contains a single iodide bridge. [32] Having in mind the previously reported findings of Beckmann et al, that during the halogenation of diaryl ditellurides it is essential to control the stoichiometry and dynamic exchanges processes, [39] we used an excess of iodine in an additional experiment. And indeed, the treatment of a (MesTe) 2 /ZnI 2 /Phen mixture (1 : 1 : 3) with three equivalents of iodine results in the formation of a red solid, which contains a variety of iodinebased species.…”