Abstract
A new cationic, water soluble phosphine (2-diphenylphosphinoethyl)trimethylammonium iodide, Ph 2PCH 2CH 2NMe + 3I −, (amphos iodide) has been synthesized and characterized. Its simple metal carbonyl substitution complexes [Fe(CO) 4amphos] +, [Mo(CO) 5amphos] +, [W(CO) 5amphos] +, (as iodide salts) have been prepared and show greatly enhanced solubility in polar solvents. The properties of these complexes are compared with those of the corresponding complexes of neutral phosphines. Spectral data indicate that amphos acts as a typical tertiary phosphine, its electron donor properties being slightly lower than those of PMePh 2 and PPh 3. The new metal carbonyl complexes exhibit very low catalytic activity for the water gas shift reaction
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