(PhTe)3: The Anionic Tellurium Analogue of I3

Abstract

The missing link between solid-state tellurium chemistry and polyhalide ions is provided by the synthesis of the almost linear (PhTe)(3)(-) ion, whose structure is shown. Tritelluride units are a recurring motif in the solid state and are related to the structures of polyhalides.

Isolation of a Catenated Organotelluride Anion in the Sodium Borohydride Reduction of Diphenylditelluride

“…Last year's discovery of [bis[hydrotris(3,5-dimethylpyrazolyl)borate]samarium(III)] tri(tellurophenolate) utilizing a reaction normally employed to prepare lanthanide chalcogenolates is the only example of an organotellurium compound with a nearly linear arrangement in the tritellurium chain . We report here that the [(TeC 6 H 5 ) 3 ] - anion can be isolated during the sodium borohydride reduction of diphenylditelluride and confirm the principal findings of structural details by X-ray structure studies on single crystals of the isotypous tetraphenylphosphonium and tetraphenylarsonium salts.…”

“…The numbering scheme for the anion of [As(C 6 H 5 ) 4 ] 1 is the same. Table contains selected distances and angles along with those of [bis[hydrotris(3,5-dimethylpyrazolyl)borate]samarium(III)] tri(tellurophenolate) . The [(TeC 6 H 5 ) 3 ] - -anion shows a nearly linear chain of three tellurium atoms of tellurophenolate fragments: Te(2)−Te(1)−Te(3) angle is 172.843(8) in [P(C 6 H 5 ) 4 ][(TeC 6 H 5 ) 3 ] and 172.917(8) in [As(C 6 H 5 ) 4 ][(TeC 6 H 5 ) 3 ].…”

Facile Pyrazolylborate Ligand Degradation at Lanthanide Centers: X-ray Crystal Structures of Pyrazolylborinate-Bridged Bimetallics

“…Because isolation of 1 was, in general, serendipitous, elemental analyses and infrared spectra were obtained in only a few cases. The infrared spectra of crystals isolated from the degradation of [Sm(Tp Me2 ) 2 OH] in benzene, from the slow crystallization of [Sm(Tp Me2 ) 2 ](TCNE)56a from THF, and from the crystallization of [Sm(Tp Me2 ) 2 ]Mn(CO) 5 56b were found to be superimposable. Two distinct types of B−H stretching absorptions were visible: one split pair at 2541 and 2522 cm -1 , in the region characteristic of tridentate Tp Me2 , and an intense sharp band at 2392 cm -1 , the low-energy shift of which suggested the presence of an electronegative element attached to the boron.…”

Chalcogen-Rich Lanthanide Clusters: Compounds with Te2-, (TeTe)2-, TePh, TeTePh, (TeTeTe(Ph)TeTe)5-, and [(TeTe)4TePh]9- Ligands; Single Source Precursors to Solid-State Lanthanide Tellurides

“…A comparison of the poly-Te ligands in 1-4 with the recently described Te(Ph)Te(Ph)Te(Ph) would also be appropriate. 48 Oddly enough, this tritellurolate analogue of I 3was also obtained in synthetic studies of lanthanide compounds, but in this case, introduction of the sterically demanding, highly electronegative ancillary pyrazolylborate ligand completely excludes coordination of Te to the Ln to produce an outer sphere (TePh) 3ion. In this unusual anion, there are a pair of inequivalent Te-Te bonds [3.112(1) Å, 2.939(1) Å] that are considerably longer than the TeTe bond in PhTeTePh [2.712(2) Å] 49 and are distinctly similar to the TeTe interactions noted in the present work.…”