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- W2121282610 abstract "Abstract Reactions of trans-R2P(O)CH=CHP(O)R2 R=Ph (I), To1 (II), Ph2P(O)CH=CHP(O)PhEt (III), Et2P(O)CH=CHP(O)PhEt (IV), and cis-R2P(O)CH=CHP(O)R2 R=Ph (V), To1 (VI) with PF5 and TaF5have been studied in MeCN and CH2C12 solutions by means of 1H, 19F, 31P and 13C FT NMR. The results indicate that in solutions the trans-isomers of dioxides (I-IV) can be mono-dentate ligands or bridging groups, and that they use one or two donor centers in complex formation with pentafluor-ides. In the latter case the ligands attach two Lewis acids to form binuclear complexes. The cis-isomers of dioxides (V-VI) can be monodentate or bridging ligands, and can also form chelate with substitution of fluoride-atoms and with formation of tetrafluorocations. The differences in relative stability of tetrafluoro-complexes of phosphorus and tantalum with chelate ligands were detected. In the case of tantalum complexes the intermolecular exchange of fluorine atoms occurs faster. The kinetic parameters of the fluorine exchange process ..." @default.
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- W2121282610 date "1990-09-01" @default.
- W2121282610 modified "2023-09-27" @default.
- W2121282610 title "Reactions of Vinylendiphosphine Dioxides with Phosphorus and Tantalum Pentafluorides" @default.
- W2121282610 doi "https://doi.org/10.1080/10426509008040879" @default.
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