| abstract |
The invention relates to new sulfonated diphosphines of the general formula in which Ar is m-C₆H₄SO₃M, M is hydrogen, ammonium, a monovalent metal or the equivalent of a polyvalent metal and Ph is the phenyl radical, m is the same or different and has the value 1 or 2 and n is the same or different and 0, 1 or 2 means their preparation and the hydroformylation of olefins and olefinically unsaturated compounds using these compounds as a component of water-soluble catalyst systems for the hydroformylation of olefins and olefinically unsaturated compounds. |