Synthesis and Reactions of Diorganyl Tellurides

Diorganyl Derivatives of Tellurium(IV) (σ-Telluranes of R2TeX2Type)

“…These reactions have been reviewed previously [223]. Thus, on heating in a sealed ampule an acetic acid solution of di(4-methylpheny1)telluride containing Fe(III), Cu(I1) or Hg(I1) chlorides, di(4-methy1phenyl)tellurium dichloride was formed in high yields [224].…”

Synthesis and reactions of organic compounds containing bonds of Te to Group 14 elements

“…Noteworthy, the reactions of these salts with diorganyl tellurides R 2 Te give complexes with the compositions 1 : 1 or 1 : 2. 72 It has been shown for the first time 63 that the cleavage of E7Te bonds in compounds 7 is effected not only by free halogens but also by organic dihalides containing rather active halogen atoms. Thus boiling of ethyl derivatives 7a ± c with 1,2-dibromoethane leads to the formation of Et 3 EBr, Te and ethylene.…”

“…Reaction of bis(triethylgermyl) telluride (7b) with dicyclohexyl percarbonate yields CO 2 and cyclohexyloxytriethylgermane together with Te, apparently as a result of decomposition of the initially formed triethylgermyl cyclohexanecarboxylate. 75 Like diaryl tellurides Ar 2 Te, 72 tellurides 7a,c eliminate Te upon heating with sulfur or selenium to give sulfides and selenides, respectively. 50,63 As in the reaction with diaryl tellurides, 72 sulfur surpasses selenium in activity.…”

Unusual reactions of 2-methyltellurocyclohexene-1-carbaldehyde with phenacyl bromides

“…Ear lier, 6 2 aryl 2 chloro 5H [2,1]oxatelluroles with a hydro gen atom or an aryl radical in this position have been reported.…”

“…8 This bond, as well as the high halophilicity of tellurides 1, are probably responsible for the unusual pathway of the title reaction. 1 H, 13 C, and 125 Te NMR spectra were recorded on a Varian Unity 300 spectrometer.…”