The structural diversity of Te–I interactions within tetraorganoditelluroxane diiodides and related compounds

Synthesis and structural features of new aryltellurenyl iodides

“…The structural interpretation of this compound is exactly the same proposed for complex 2, from which 6 can be derivatized by substitution of the single iodine atom by R. The measured bond distances and angles of 6 correspond also to those of 2. Tetra-coordinated Te IV complexes of the type R 2 TeX 2 (X = Cl, Br, I) have been extensively discussed by Beckmann and co-workers [29][30][31][32], and the distorted tetrahedral seems to be the preferential configuration for R 2 TeI 2 compounds. We can attribute the RR 0 EÁX 2 , three-coordinated MC [20,21] configuration of 6 (see discussion of compound 2), to the cleavage of the RÀTe bond occurred in the starting complex (PyH)[tmpTeI 2 ] (3), from which 5 and 6 are formed.…”

A survey of tellurium-centered secondary-bonding supramolecular synthons

“…ping open tellurium sites limiting the supramolecular structure to monomers or dimers. Compounds ( 2 -oxo)-bis((azido)-(pentane-1,5-diyl))-di-tellurium(IV) (29) [63] and bis( 2 -oxo)-di-iodotris(butane-1,4-diyl)-tri-tellurium(IV) (30) [47] associate to form supramolecular ribbon polymer structures (Fig. 9) through [Te-1-Te N] 2 and [Te-1-Te I] 2 respectively, while ( 2 -oxo)-di-iodotetramethyl-di-tellurium(IV) (31) [47] forms a 2D network through [Te-1-Te I] 2 supramolecular synthons.…”

“…Hydrogen atoms have been omitted for clarity. Original data from Refs [40][41][42][43][44][45][46][47][48]…”

Carbon Dioxide Fixation with Dialkyltellurium(IV) Dihydroxides

“…The IR spectra of 1 and 2 show strong absorptions at 1483 and 1305 as well as 1640 and 1333 cm –1 , respectively, which were assigned to asymmetric and symmetric C–O stretching vibrations. Similar absorptions are absent in the IR spectra of the closely related IMe 2 TeOTeMe 2 I and I(CH 2 ) 4 TeOTe(CH 2 ) 4 OTe(CH 2 ) 4 I 34. The coupling between the asymmetric and symmetric C–O stretching vibration is smaller in 1 (178 cm –1 ) than 2 (307 cm –1 ), which complies with the fact that the coordination of the carbonate to the tellurium atoms of 1 (entry 10, type D) is stronger than that of 2 (entry 11, type C).…”