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- W2017498809 abstract "The redox process of the water-soluble systems: TPPTS–Pd(OAc)2, PdSO4, PtCl2, Rh2(SO4)3, and RhCl3, have been investigated at room temperature by 31P-NMR spectroscopy, polarography and pH measurement. (TPPTS: 3,3′,3″-phosphinidynetris(benzenesulfonic acid) trisodium salt, or the usual name: tris(m-sulfophenyl)phosphine trisodium salt). For a particular given value of pH, controlled by NaOH addition, except for Rh2(SO4)3 which leads to a Rh(OH)3 precipitate, every system evolved very quickly, producing quantitatively OTPPTS (TPPTS oxide) and the metallic complexes with TPPTS in a reduced state: Pd(TPPTS)n at pH>5; Pt(TPPTS)n+1 at pH>7; [+Rh(TPPTS)n] at 7<pH<13, n ranging between 2 and 3. With Pd(II) and Pt(II) which are complexed in the oxidized state, the hydroxide ion intervenes probably to accelerate the disproportionation of an hydroxo species such as MOH(TPPTS)n+ into OTPPTS and a low valence state metal complex: OH−+HOM(TPPTS)n+→M(TPPTS)n−1+OTPPTS+H2O. The fact that TPPTS complexation by Rh(III) is not observed, implies that the different hydroxochloro Rh(III) species react directly with TPPTS to produce OTPPTS and Rh(I) which is subsequently complexed by TPPTS." @default.
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- W2017498809 title "Redox chemistry of Pd2+, Pt2+, Rh3+–TPPTS systems in water: pH influence on the preparation of low valent TPPTS complexes" @default.
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- W2017498809 doi "https://doi.org/10.1016/s1381-1169(97)00152-0" @default.
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