Weak complexes of sulphur and selenium. Part I. Complex species of SO2, SOCl2, and SO2Cl2 with chloride, bromide, and iodide ions

Abstract

The formation of 1 : 1 complex species between SO₂, SOCl₂, SO₂Cl₂, and Cl^–, Br^–, and l^– is reported. The stability constants of the SO₂X^– species were determined in acetonitrile, dimethyl sulphoxide, and water. The stability constants of SOCl₂,X^– and SO₂Cl₂,X^– were determined in acetonitrile. The standard enthalpies of formation point to weak association of a charge-transfer type. The nature of association between the complexing components is discussed in relation to the acid–base characters of such components.