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  • 1
    ISSN: 0044-2313
    Keywords: Brominepentafluoride ; Arylbrominetetrafluoride ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions on the Chemistry of Brominepentafluoride. 3. Reactions of Brominepentafluoride and Arylbrominetetrafluoride with N-Bases, of Arylbrominetetrafluoride with Fluoride Ions, and the Fluorine-Aryl Monosubstitution Reactions on the Hexafluorobromate (V) AnionBrF5 forms 1 : 1 adducts with pyridines in organic solvents. In BrF5—N-base adducts the axial Br—F bond is activated for fluorine-aryl substitution reactions. Arylbrominetetrafluorides resulting from fluorine-aryl monosubstitutions also yield 1 : 1 adducts with pyridines; in contrast to BrF5 they react with fluoride ions under reductive elimination. Fluorine-aryl substitutions on [BrF6]- are presented and the influence of the Lewis-acidity of the aryltransfer reagent and its coproduct is discussed.
    Notes: Pyridine bilden in organischen Lösungsmitteln 1:1-Addukte mit BrF5. In BrF5—N-Basen— Addukten ist die axiale Br—F-Bindung für Fluor-Aryl-Substitutionen aktiviert. Die bei Fluor-Aryl-Monosubstitutionen resultierenden Arylbromtetrafluoride ergeben mit Pyridinen ebenfalls 1:1-Addukte, reagieren dagegen abweichend von BrF5 mit Fluorid-Ionen unter reduktiver Eliminierung. Fluor-Aryl-Substitutionen am [BrF6]--Ion werden vorgestellt und der Einfluß der Lewis-Acidität des Arylüberträger Edukts und seines Coprodukts diskutiert.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 209-214 
    ISSN: 0044-2313
    Keywords: Arylbrominetetrafluoride ; Arylbrominedifluorideoxide ; Arylbrominedioxide ; Brominepentafluoride ; Brominetrifluorideoxide ; Brominefluoridedioxide ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Brominepentafluoride. 4. Arylbromine(V) Dioxides and Fluorideoxides.Arylbromine(V) tetrafluorides RBrF4 (R=C6F5, p- and m-CF3C6H4, o-FC6H4) react in aimed hydrolysis reactions or with (Me3Si)2O to the corresponding arylbrominedioxides RBrO2. However with CsNO3 as reagent for fluorine-oxygen substitution arylbrominedifluorideoxides RBrOF2 are formed.Fluorine-oxygen substitution reactions on BrF5 with (Me3Si)2O and [F3CC(O)]2O in organic solvents proceed via polysubstitution and end under formation of BrO2F whereas with C6F5C(O)OSiMe3 via monosubstitution BrOF3 is obtained.In organic solvents bromine(V) fluorideoxides are  -  similar to BrF5  -  principally accessible to fluorine-aryl substitution what is demonstrated by the formation of C6F5BrO2 from BrO2F.
    Notes: Arylbrom(V)-tetrafluoride RBrF4 (R=C6F5, p- und m-CF3C6H4, o-FC6H4) werden durch gezielte Hydrolyse oder Reaktion mit (Me3Si)2O in die entsprechenden Arylbrom(V)-dioxide RBrO2 überführt. Dagegen erhält man mit CsNO3 als Fluor-Sauerstoff-Substitutionsreagenz Arylbromidifluoridoxide RBrOF2.Fluor-Sauerstoff-Substitutionsreaktionen an BrF5 in organischen Lösungsmitteln mit (Me3Si)2O und [F3CC(O)]2O erfolgen unter Polysubstitution und BrO2F-Bildung, mit C6F5C(O)OSiMe3 kann über die Monosubstitution auch die Stufe des BrOF3 realisiert werden.Bromoxyfluoride sind in organischen Lösungsmitteln - wie BrF5 selbst - prinzipiell der Fluor-Aryl-Substitution zugängig, wie die Darstellung von C6F5BrO2 aus BrO2F belegt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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