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  • 1
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Nuclear Magnetic Resonance Spectroscopic Studies of Alkylene/Alkylidenebis(phosphonic Dihalides) and- bis(fluorophosphoranes)Chlorine-fluorine exchange in the bis(phosphonic dichlorides) Cl2P(O) - X- P(O)Cl2 (1a-c) with AsF3 furnisches the bis(phosphonic difluorides) F2P(O)—X—P(O)F2 (2a-c). Reaction of 2a-c with SF4 leads to bis(tetrafluorophosphoranes) F4P—X—PF4 (3a-c) (X = CH2, CH2CH2, trans-CH=CH). Additional methods of synthesis are indicated for compound 3a (X = CH2) which are based on the cleavage of the Si—C bond with PF5 in the Si-C bonded precursors [Me2SiCh2]2 and Me3SiCH2PF4. The NMR spectra of compounds 2 and 3 are discussed.
    Notes: Durch Chlor-Fluor-Austausch in den Bis(phosphonsäuredichloriden) Cl2P (O)—X—P(O) Cl2 (1a-c) mit AsF3 werden die Bis(phosphonsäuredifluoride) F2P (O)—X—P(O)F2 (2a-c) dargestellt. Deren Umsetzung mit SF4 liefert die Bis(tetrafluorphosphorane) F4P—X—PF4 (3a-c) (X = CH2, CH2 CH2, trans-CH = CH). Für die Verbindung 3a (X = CH2) werden weitere Darstellungsmethoden angegeben, die sich auf die Spaltung der Si—C-Bindung mit PF5 in den Si—C-Verbindungen [Me2SiCH2]2 bzw. Me3 SiCH2PF4 gründen. Die NMR-Spektren der Verbindungen 2 und 3 werden diskutiert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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