Tellurium O-Ethyl dithiocarbonate Halides

Tellurium (O-ethyl dithiocarbonate) halides are red-brown crystalline materials that are slightly soluble in aromatic and chlorinated solvents but insoluble in aliphatic hydrocarbons. In ethanol solution the compounds slowly decompose . In the bromide derivative, the tellurium atom is surrounded by the two sulfur atoms from the bidentate dithiocarbonate and two bromine atoms, one of which belongs to a neighboring molecule. These four atoms form a planar trapezoid around the tellurium atom. The molecules are arranged in a helix held together by Te —Br—Te bridges .  

Irgolic Organo-tellurium Compounds without a C,Te-Bond 

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Tellurium bis[< -ethyl dithiocarbonate] reacted with the stoichiometrically required amounts of halogens1,2, copper(II) halides, or tellurium tetrachloride1 to produce tellurium (O-ethyl dithiocarbonate) halides. 

Tellurium (O-Ethyl dithiocarbonate) Halides (Halogen Method) 2.0 g (5.4 mmol) of tellurium bis[0-ethyl dithiocarbonate] are dissolved in 50 m/of dichloromethane, 2.7 mmol of halogen (0.19 g of chlorine, 0.43 g of bromine, or 0.69 g of iodine) dissolved in carbon tetrachloride are added, the mixture is stirred for 1 h, and then filtered. The filtrate is evaporated under reduced pressure, the residue is washed with boiling light petroleum ether, and recrystallized from chloroform/light petroleum ether yield not reported m.p. not reported. 

Tellurium tetrachloride or tetrabromide reacted with three molar equivalents of potassium O-ethyl dithiocarbonate to form tellurium (0-ethyl dithiocarbonate) halides ... 

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