Abstract
Cationic halfsandwich-type complexes of sulfur dioxide, [C5R5M(PR3)2(SO2)]+ (R = H, Me, M = Fe, Ru, (PR3)2 = mono- or bidentate phosphorus ligands) and [C5Me5Fe(CO)(PR3)(SO2)]+, are obtained by ligand exchange from labile cationic (M = Fe) or neutral (M = Ru) precursors. The new compounds are characterized by IR, 1H13 1H, 13C and 31P NMR spectroscopy. Their stability increases with increasing electron density at the metal.
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