THE EXTRACTION OF CATIONIC RUTHENIUM COMPLEXES FROM AQUEOUS-MEDIA BY ALPHA-TIN(IV) HYDROGEN PHOSPHATE

The ruthenium species [Ru(NH3)(6)](3+) was adsorbed by the surface of (alpha-Sn(HPO)(4).2H(2)O [SnP]) alpha-tin(IV) hydrogen phosphate. The ruthenium(II)-containing cation [Ru(NH3)(6)](2+), however, has been di rectly intercalated into (SnP). Since the corresponding ruthenium(III) complex cation was not so intercalated, a new self-catalysed intercal ation mechanism involving labile ammonia ligands from the ruthenium(II ) has been proposed. At high loadings, guest ruthenium(II) species wer e oxidised to ruthenium(III).