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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Fluorine Chemistry 23 (1983), S. 470 
    ISSN: 0022-1139
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 507 (1983), S. 93-99 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of a Tetraalkoxy HydrospirophosphoraneThe hydrophosphorane HP[OC(CF3)2C(CF3)2O]2 is oxidized by dimethylsulfoxide to form a hydroxy phosphorane, which may be silylated easily. Chlorine and bromine react to give the corresponding halo spirophosphoranes. FP[OC(CF3)2C(CF3)2O]2 is obtained from FPCl2[OC(CF3)2C (CF3)2O] and Li2[OC(CF3)2C(CF3)2O]. In the presence of triethyl amine HP[OC(CF3)2C(CF3)2O]2 is converted by benzylbromide or acetylchloride to RP[OC(CF3)2C(CF3)2O]2 (R = PhCH2, MeC(O)). Trimethylphosphine performs an acid-base reaction producing a thermally unstable Me3PH+{P[OC(CF3)2C(CF3)2O]2}-. The hydrolysis of the parent compound gives phosphorous acid and perfluoropinacole.
    Notes: Das Hydrophosphoran HP[OC(CF3)2C(CF3)2O]2 wird durch Dimethylsulfoxid zu einem Hydroxyphosphoran oxidiert, welches leicht silyliert werden kann. Chlor und Brom ergeben die entsprechenden Halogenspirophosphorane; FP[OC(CF3)2C(CF3)2O]2 wird aus FCl2P[OC(CF3)2 C(CF3)2O] und Li2[OC(CF3)2C(CF3)2O] erhalten. In Gegenwart von Triethylamin reagiert HP[OC(CF3)2C(CF3)2O]2 mit Benzylbromid bzw. Acetylchlorid zu RP[OC(CF3)2C(CF3)2O]2 (R = PhCH2, MeC(O)). Trimethylphosphin setzt sich in einer Säure-Base-Reaktion um zu dem thermisch instabilen Me3PH+{P[OC(CF3)2C(CF3)2O]2}-. Die Hydrolyse der Stammverbindung ergibt phosphorige Säure und Perfluorpinakol.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Potassium-[1,2,2,2-tetrafluoro-1-(trifluoromethyl)ethylat], a Nucleophil and Reactant for Oxidative Fluorination in the Reaction with 2-Halogeno-4,4,5,5-tetrakis(trifluoromethyl)-1,3,2-dioxaphospholanes [1]The cyclic fluorophosphite XP[OC(CF3)2C(CF3)2O] (X = F), 4, was oxidized by [OCF(CF3)2]-, 1 to give the λ5σ6-phosphates cis-{F2P[OC(CF3)2C(CF3)2O]2}-, 8a, fac-/mer-isomers {F3P[OC(=CF2)CF3][OC(CF3)2(CF3)2O]-, 9a/b, and {F3P[OCF(CF3)2][OC(CF3)2(CF3)2O]}-, 10a/b. In the case of the respective chloro and bromo phosphites (5: X = Cl, 6: X = Br) λ3σ3P- and λ5σ5P- compounds were obtained, too. XC(CF3)2OP[OC(CF3)2C(CF3)2O] (11: X = Cl, 12: X = Br) were probably formed by “inverse halogenation” from the hypothetical FC(CF3)2OP[OC(CF3)2C(CF3)2O] precursor for phosphorane 14, FC(CF3)2OPF2[OC(CF3)2C(CF3)2O] (11: X = Cl, 12: X = Br) were precursor for phosphorane 14, FC(CF3)2OPF2[OC(CF3)2C(CF3)2O]. Possible intermediates are fluoro phosphoranyl radicals and the ketyl anion [OC(CF3)2]-. Long-range F⃛F couplings were observed in 8a und 9a useful for elucidating the molecular structure.
    Notes: Das cyclische Fluorphosphit XP[OC(CF3)2C(CF3)2O] (X = F) 4 wurde von [OCF(CF3)2]-, 1 zu λ5σ6-Phosphaten oxidiert, nämlich zu dem Spirophosphat cis-{F2P[OC(CF3)2C(CF3)2O]2}-, 8a, und den fac-/mer-Isomeren {F3P[OC(=CF2)CF3][OC(CF3)2(CF3)2O]}-, 9a/b, sowie {F3P[OCF(CF3)2][OC(CF3)2C(CF3)2O]}-, 10a/b. Im Falle des entsprechenden Chlor- bzw. Brom-Phosphits (5: X = Cl, 6: X = Br) wurden auch λ3σ5P-Verbindungen beobachtet. So entstanden XC(CF3)2OP[OC(CF3)2C(CF3)2O] (11: X = Cl, 12: X = Br) wohl durch “inverse Halogenierung” aus dem nicht faßbaren Phosphit FC(CF3)2OP[OC(CF3)2C(CF3)2O], 7, welches als Vorstufe für das Phosphoran FC(CF3)2OP[OC(CF3)2C(CF3O)], 14, angesehen wird. Möglicherweise verlaufen die Redoxreaktionen über Fluorphosphoranylradikale bzw. das Ketylanion [OC(CF3)2]-. Weitreichende F…F-Kopplungen wurden bei 8a und 9a festgestellt und zur Strukturermittlung herangezogen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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