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- W1973182402 abstract "Transition Metal-Activated Organic Compounds, XXXVII[1]. — A Novel Reaction of Aldehydes and Ketones: Synthesis and Spectroscopic Investigation of α1-Phosphonioalkoxy Transition Metal Complexes1 Herrn Professor Ulrich Schöllkopf zum 65. Geburtstag gewidmet. By treatment of aldehydes and ketones with one mole equivalent of a Lewis acid (TiCl4, NbCl5, TaCl5) and one mole equivalent of PPh3, or in one case of Ph2PCH2CH2PPh2, the aldehyde derivates [R1CH(P+Ph2R2)–OMCln]Cl– (4–8; MTi, Nb, Ta; R2Ph or CH2CH2PPh2) and the ketone derivatives [R1R2C(P+Ph3)–ONbCl4]Cl– (9–10) were prepared. Complexes 4–10 were isolated as air-and water-sensitive solids. According to the NMR spectra some of the obtained aldehyde derivatives 4–8 exist in solution as a mixture of isomers or oligomers, whereas the ketone derivatives 9 and 10 form in solution an equilibrium with the free ketone and the complex NbCl5 · PPh3. The chloride ion of 4–10 is perhaps coordinated to the metal." @default.
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- W1973182402 date "1993-02-01" @default.
- W1973182402 modified "2023-10-16" @default.
- W1973182402 title "Übergangsmetallaktivierte organische Verbindungen, XXXVII. über eine neue Aldehyd-und Ketonreaktion: Synthese und spektroskopische Untersuchung von α1-Phosphonioalkoxy-übergangsmetallkomplexen" @default.
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- W1973182402 doi "https://doi.org/10.1002/cber.19931260224" @default.
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