Synthesis and characterization of aryltellurium compounds including mixed-valence derivatives − evaluation of Te⋅⋅⋅S, Te⋅⋅⋅X and X⋅⋅⋅X (X = Br, I) interactions

Large Telluroxane Bowls Connected by a Layer of Iodine Ions

“… [17] But also many Te−I bonds fall into this range, for example, those in [PhTeI 3 ] 2 , [TeI(thiourea)] 2 or [Me 2 PhTeI] 2 . [ 18 , 19 , 20 , 21 ] Due to the spherical structure of the cluster, the distances of the inner, six‐membered ring of iodine atoms to their adjacent tellurium atoms are clearly longer (3.808–4.150 Å), but most of them are still within the sum of the van der Waals radii of tellurium and iodine. [22] DFT calculations confirm the mainly electrostatic nature of these interactions.…”

Large Telluroxane Bowls Connected by a Layer of Iodine Ions

“…[17] But also many TeÀIb onds fall into this range,for example,those in [PhTeI 3 ] 2 ,[Te I(thiourea)] 2 or [Me 2 PhTeI] 2 . [18][19][20][21] Due to the spherical structure of the cluster, the distances of the inner, six-membered ring of iodine atoms to their adjacent tellurium atoms are clearly longer (3.808-4.150 ), but most of them are still within the sum of the van der Waals radii of tellurium and iodine. [22] DFT calculations confirm the mainly electrostatic nature of these interactions.…”

“…This means for the compounds under study that the bonding forces for the “outer‐sphere” Te−I bonds are in the magnitude of those of the iodine atoms in the triiodide ions in (Me 3 NC 6 H 12 NMe 3 )I 3 [17] . But also many Te−I bonds fall into this range, for example, those in [PhTeI 3 ] 2 , [TeI(thiourea)] 2 or [Me 2 PhTeI] 2 [18–21] . Due to the spherical structure of the cluster, the distances of the inner, six‐membered ring of iodine atoms to their adjacent tellurium atoms are clearly longer (3.808–4.150 Å), but most of them are still within the sum of the van der Waals radii of tellurium and iodine [22] .…”

An Experimental and Theoretical Insight into I2/Br2 Oxidation of Bis(pyridin‐2‐yl)Diselane and Ditellane

“…A further oxidation step can lead to discrete arylchalcogenyltetrahalides [13–15] [ArCh IV X 4 ] − or extended catena‐μ‐halo‐dihalo(aryl)‐chalcogen(IV) [15–17] with the chalcogen atom assuming a distorted square‐pyramidal geometry. Halides in ArCh II X, [ArCh II X 2 ] − , and [ArCh IV X 4 ] − species can be displaced by chalcogen donors [18] RCh′ to give a variety of mixed‐valence interchalcogen compounds [19] stabilized by ArCh(X) n ←Ch′R interactions ( n =0–3), such as [PhTe II (S=C(NH 2 ) 2 )][PhTe IV I 4 ], [20] often displaying fascinating supramolecular structures based on both chalcogen bond (ChB) and halogen bond (XB) interactions resulting in Ch⋅⋅⋅Ch′, Ch⋅⋅⋅X, and X⋅⋅⋅X contacts. A further example is provided by mesityltellurenyl iodide MesTeI (Mes=2,4,6‐trimethylphenyl), obtained by diiodine oxidation of bis(mesityl)ditellane Mes 2 Te 2 , which was isolated in the neutral 2 : 1 adducts with 1,1′‐bis(3‐methyl‐4‐imidazolin‐2‐selone)methane and 1,2‐bis(3‐methyl‐4‐imidazolin‐2‐selone)ethane, featuring the linear Se→Te−I moiety [18] .…”