Synthesis and Characterization of Organotellurium(IV) Chlorosulphates

Abstract

A variety of diorganotellurium(IV) chlorosulphate R₂Te(SO₃Cl)₂ [R=C₆H₅, 4-CH₃C₆H₄, 4-CH₃OC₆H₄ 4C₂H₅OC₆H₄, (4-C₂H₅OC₆H₄) C₆H₅] have been prepared by the metathetical reaction of organotellurium diacetates with HSO₃Cl. The UV spectra in MeCN exhibit bands characteristic of excitations from a nonbonding to an antibonding σ molecular orbitals [η(5px)-σ*(4a₁,3b₂)]. The proton resonances observed in ¹H NMR spectra of these compounds in d₆-DMSO are considerably deshielded from that observed for the corresponding diacetates indicating the drainage of the non-bonding electrons at tellurium towards SO₃Cl⁻ group.

Keywords::

• Organotellurium(IV) chlorosulphates
• anion acceptors