Organophosphorus Ligands in Studies of Metal Complexes. Investigations of Ligand Exchange and Multielement Trace Analysis using Dithiophosphinic Ligands |
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| Authors: | W Kuchen E Lehnert Peter Panster Peter Kleinschmit |
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| Institution: | 1. Institut für Anorganische Chemie und Strukturchemie I Universit?t Düsseldorf , Universit?tsstr. 1, 4000, Düsseldorf , 1 , F.R.G;2. Degussa AG, Inorganic Research Division , D-6450, Hanau , West Germany |
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| Abstract: | Abstract On mixing organic solutions of Et2PS2]M/n and Prop2PS2]M/n M=Pd(II), Pt(II), Rh(III), lr(III), Cr(III)] an equilibrium is obtained containing statistical amounts of the corresponding mixed ligand complexes as can be shown by 31P{1H}-NMR, HPLC and FD-MS. With Pt(II)- and Pd(II)-chelates the kinetics of ligand exchange was determined by HPLC. Mixed complexes ML2L′ and MLL′2 were isolated from the equilibrium solutions in case of the more inert Cr(III)-, Rh(III)- and lr(III)-chelates by preparative HPLC. Pd(II), Pt(II) and Rh(III) can be determined quickly and simultaneously in aqueous solutions at nanogramm level by complexation with Et2PS2? in a modified sample loop followed by reversed phase HPLC. |
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