The reactions of tellurium tetrachloride with aliphatic monoketones

Abstract

The reactions of 13

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

“…In some cases, depending upon the structure of the initial ketone and to a lesser degree on the reaction conditions, a mixture of tellurium dichlorides 18 and tellurium trichlorides 19 or exclusively compounds 19 may be obtained. Thus, the mixture of PrCOCH2TeC13 (47%) and (PrCOCH&TeC12 (6 1 %) is formed when 2-pentanone is reacted with TeC14 [96]. Trichloride of the type 19 is obtained by refluxing a solution of 3-methoxyacetophenone and TeC14 (molar ratio 1 : 1) in C C 4 for 7 h, whereas 76 h refluxing of these substrates (molar ratio 2 : 1) in CHC13 leads to the corresponding tellurium dichlorides of type 18 [97].…”

The reactions of tellurium tetrachloride with acetone

“…The proton NMR spectrum of a solution of these white crystals in chloroform-d showed the expected two singlets (6 2.42, CH,; 6 4.62, CH3) with the correct intensity ratio (Table 1). The Te-125 resonance (6 735) identified the compound as a diorganyl tellurium dichloride [ 5 ] . The concentrated mother liquor from this preparation gave a proton spectrum with four resonances with intensity ratios that could not be interpreted as a mixture of diacetonyl tellurium dichloride and acetonyl tellurium trichloride.…”

“…Earlier, we investigated the reactions of aliphatic monoketones with tellurium tetrachloride in the presence of a proton scavenger [ 5 ] . The re-actions conducted by Morgan were carried out in the absence of a proton scavenger such as sodium hydrogen carbonate, and, under these conditions, the reaction is somewhat more complicated.…”

Synthesis, Characterization, Thermal and conductivity Study for 1,4-dimethyl-2,5-bis(tellurocyanatomethyl)benzene

“…Another tellurium compound diorganyl ditellurium (2-Te-2,Diorganyl ditelluriumR) (14)(15)(16)(17)(18)(19)(20) .This type of compound is characterized as solid, orange to red compounds, with the exception of bis(3-chloro-2-pyridyl) ditelluride, which has a mysterious blue colo (21)(22)(23)(24)(25)(26)(27) . Alkylation of sodium disodium Na2Te2 by two moles of alkyl halide (28,10,9) is one of the most important methods for preparing this type of compound, as in equation 2…”