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• W2073754233 abstract "Monocationic amphiphilic tertiary phosphines [RMe2N-(CH2)n-PR′2]+ X− (1–3) obtained by P-alkylation of the corresponding primary phosphines (R′  H) form stable tungstencarbonyl-, Rh(I)-olefin- and square planar Pd(II)-complexes (4–8a). Stepwise protonation of [Me2N-(CH2)2]3P (9) by Ph3P · HBr or aqueous HCl affords tricationic tertiary phosphine ligands, e.g. {[HMe2N-(CH2)2]3P}3+ 3X− (13, 13b) and the phosphonium salt {[HME2N-(CH2)2]3P-H}4+ 4Cl− (13a). The pKa-values 9.67, 8.86, 7.92 and 1.9 have been obtained by titration of 13a with NaOH in aqueous solution. Highly charged Pd(II)-complexes (16a, 16b) with extreme water solubilities were obtained from 13 and PdBr2 or by N-protonation of cis-PdCl2(9)2 with HCI. The crystal structures of 13 · 0.5H2O and {trans-{[HMe2N-(CH2)2]3P})2PdCl2}6+ 6Cl−· 2MeOH (16b) (space group C2/c) have been determined. While the P( … N)3 skeleton of the trication in 13 is almost flat, it is folded back on coordination to palladium(II) in 16b. Monokationische amphiphile tertiäre Phosphane [RMe2N-(CH2)n-PR′′2]+ X− (1–3), dargestellt durch P-Alkylierung der entsprechenden primären Phosphane (R′ H), bilden stabile Wolframcarbonyl- and Rh(I)-Olefinkomplexe sowie quadratisch planare Palladium(II)-Komplexe (4–8a). Durch stufenweise Protonierung von [Me2N-(CH2)2]3P (9) mit Ph3P · HBr oder wäβriger HCl erhält man kationische tertiäre Phosphane, z.B. [HMe2N-(CH2)2]3P3+ 3X− (13, 13b), and das Phosphoniumsalz {[HMe2N-(CH2)2]3P-H}4+ 4CI− (13a). Die pKa Werte (9.67, 8.86, 7.92 and 1.9) wurden durch Titration von 13a im wäβrigen Medium bestimmt. Dutch Komplexierung von 13 mit PdBr2 oder Protonierung von cis-PdCl2(9)2 mit überschüssiger HCl sind die hochgeladenen Pd(II)-Komplexe 16a, 16b zugänglich, die extrem hohe Löslichkeiten in Wasser aufweisen. Die Röntgenstrukturanalysen von 13 · 0.5H20 (Raumgruppe P3) and trans-([HMe2N-(CH2)2]3P}2PdCl2)6+ 6Cl-· 2MeOH (16b) (Raumgruppe C2/c) wurden ermittelt. Das nahezu planare P( … N)3-Skelett des Trikations in 13 wind bei Koordination an Palladium(II) in 16b pyramidalisiert." @default.
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• W2073754233 date "1995-10-01" @default.
• W2073754233 modified "2023-10-14" @default.
• W2073754233 title "Wasserlösliche Phosphane V. Komplexe amphiphiler tertiärer alkylphosphane mit Ammoniumgruppierungen in den seitenketten" @default.
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• W2073754233 doi "https://doi.org/10.1016/0022-328x(95)05705-t" @default.
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