Organotellurium Derivatives. Syntheses and Characterization of Dimethyl and Diethyl Telluriumdichlorosulphates [R₂Te(SO₃Cl)₂]

Abstract

Dimethyl and diethyl telluriumdichlorosulphates have been isolated in the form of dark brown colored crystalline solids utilizing the solvolytic reactions of the corresponding di-iodides with chlorosulphuric acid. The electrical conductivity and IR spectroscopic studies confirm that these compounds are non-ionic and the mode of linking of the chlorosulphate group to the tellurium atom is covalent, resulting in a reduced C_s symmetry for the chlorosulphate group. The PMR spectral study indicates that the corresponding methyl and ethyl protons of these molecules are deshielded which is consistent with the lowering of the non-bonded electron density at tellurium atom due to its drainage towards the chlorosulphate group.