Abstract
O-Alkyl dithiocarbonate (xanthate) derivatives of halodimethyltellurium(IV), Me2TeX[S2COR], where R = Me, Et, and i-Pr and X = Cl, Br, and I, have been prepared in 75−88% yields by the reaction of the potassium salt of the appropriate dithiocarbonic acid with dimethyltellurium dihalide in equimolar ratio. The compounds were characterized by infrared, Raman, and 1H, 13C, and 125Te NMR spectroscopy. The crystal structures of Me2TeCl[S2COEt] (2) and Me2TeI[S2CO(i-Pr)] (9) were determined. Me2TeCl[S2COEt] (2), which crystallizes in the monoclinic space group P21/a (No. 14), has the cell parameters a = 9.583(2) A, b = 10.264(3) A, c = 22.502(2) A, β = 97.86(1)°, V = 2192.4(8) A3, and Z = 8, and Me2TeI[S2CO(i-Pr)] (9), which crystallizes in the triclinic space group P1 (No. 2), has the cell parameters a = 11.332(5) A, b = 11.83(2) A, c = 10.19(2) A, α = 94.8(2)°, β = 105.53(7)°, γ = 85.10(7)°, V = 1309(3) A3, and Z = 2. The immediate environment about tellurium in both molecules can be described as that of a s...
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