Convenient synthesis of hexakis(dimethyl sulphoxide)ruthenium(III) and tetra(halogeno) bis( dimethyl sulphoxide)ruthenate(III)

Abstract

Cationic and anionic complexes of ruthenium(III), <em>viz., </em>[Ru(Me₂SO)₆]X₃ (X=ClO₄ or BPh₄) and NR₄[RuX₄(Me₂SO)₂] (R = Me, X = Cl; R = Et, X = Br) have been synthesized and characterized by IR, UV-visible and EPR spectroscopy, magnetic susceptibility and molar conductance measurements. [Ru(Me₂SO)₆]³⁺ has three S-bonded and three O-bonded Me₂SO molecules, arranged in a facial octahedral geometry around the metal ion. The anionic complexes possess <em>cis </em>geometry, the coordination of Me₂SO being through the S-atom in the chloro complex and through the O-atom in the bromo analogue.