ChemInform Abstract: ORGANOTHIOPHOSPHORUS REAGENTS IN ORGANIC SYNTHESIS

Organophosphorus–Tellurium Chemistry: From Fundamentals to Applications

“…13 As illustrated in Figure 2, the crystal structure of BaP 4 47 The 1 J( 31 P, 125 Te) coupling of 1387 Hz reported for 9a 48 is significantly higher than those for other aryltellurenyl cations.…”

“…2.47 Å for a single bond and ca. 2.30 Å for a hypothetical double bond; [22][23][24] the sum of the van der Waals radii is estimated to be 3.86 Å, 26 4.12 Å 26 or 4.40 Å. 27 A close inspection of the available data indicates that the correlation between the values of d(P-Te) and 1 J( 31 P, 125 Te), if it exists, is limited to a narrow range of constitutionally and structurally similar compounds.…”

“…Binary P-Te species can, however, be stabilized in solid-state materials as manifested by the ternary telluride BaP 4 Te 2 , which is prepared by heating a stoichiometric mixture of the three elements at 475 °C. 13 As illustrated in Figure 2, the crystal structure of BaP 4 47 The 1 J( 31 P, 125 Te) coupling of 1387 Hz reported for 9a 48 is significantly higher than those for other aryltellurenyl cations.…”

“…ditelluride Na 2 Te 2 , which was found to be the most effective source of tellurium in these reactions. 14 X-ray crystal structures were obtained for the telluradiphosphirane (RP) 2 Te (21a, R = OMes*), the telluratriphosphetane (AdP) 3 Te (22), and the telluratetraphospholane (FcP) 4 Te (23) (Figure 8a-c). In addition, the first example of a tritelluratriphosphorinane (TrtP) 3 Te 3 (24) was prepared and structurally characterized (Figure 8d).…”

“…10,11 Over the past 50 years this class of organophosphorus(V)-tellurium compound has attracted increasing attention, most notably as a source of reactive Te 0 in the generation of semiconducting metal tellurides in the form of nanomaterials or quantum dots for applications as optoelectronic or thermoelectric materials and as infrared detectors or biomarkers (Section 6.7). Although neutral binary P-Te compounds are unknown, the recent characterization of the anion P 4 Te 2 2− in solution 12 and, earlier, in a solid-state material 13 may presage an extensive series of P-Te anions (Section 3). The challenge of characterizing organophosphorus(III)-tellurium heterocycles in the solid state has recently been surmounted by using bulky substituents on phosphorus thus providing the opportunity to compare the ligand properties of organophosphorus-tellurium rings with the established behavior of their acyclic and lighter chalcogen analogs (Section 5.2).…”