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Abstract
(Te—S) bonded compounds of the general formula [R2Te{S2P(OR')2}2| (R=CH3, C6H5, p-MeOC6H4; R'=CH3, C2H5, CH(CH3)2(CH2)2CH3 and CH2CH(CH3)2] have been synthesized by the reaction of R2TeCl2 with the ammonium salt of O,O';-dialkyldithiophosphoric acid in anhydrous toluene at ambient temperature or by the reaction of R2Te(OR')2 (R'=CH3 or C2H5) with corresponding acids. The compounds are monomeric and non-electrolytes in nature. They decompose (TeIV → + Te11 → Te°) slowly in solvents such as CH2Cl2, CHCl3 or CCl4 at ambient temperature. The decomposition products have been characterized. The interaction of [R2Te{S2P(OR')2}2] with phosphine donor bases results in their complete decomposition yielding tellurium metal. The newly synthesized derivatives have been characterized on the basis of analytical and spectral (IR, 1H. 13C, 31P and 125,Te NMR) data. A possible geometry around the central tellurium atom has been proposed.