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  • Chemistry  (1)
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    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tetraphenyl Imidodiphosphate as Ligand in Fluoro Complexes. 3. Fluoro Complexes of Niobium, Tantalum, and AntimonyTetraphenyl imidodiphosphate forms with NbF5, TaF5, and SbF5 the addition complexes MF5 · LH and (MF5)2(μ-LH). The imidodiphosphate acts in the latter as bidentately bridging ligand. Furtheron, it reacts with NbF5 and TaF5 by replacing fluoride forming tetrafloro and trifluoro complexes: [MF4(μ-L)]2 and MF3(η2-L)(OPh) or μ-O[MF3(η2-L)]2, resp., (M = Nb, Ta). SbF5 does not form substitution complexes. The constitution and conformation of the complexes have been concluded from n.m.r. spectroscopic data.
    Notes: Imidodiphosphorsäuretetraphenylester, (PhO)2P(O)NHP(O)(OPh)2 (LH), bildet mit NbF5, TaF5 und SbF5 in Acetonitril Additionskomplexe der Zusammensetzung MF5 · LH und (MF5)2(μ-LH). In letzteren fungiert der Ester als zweizähniger Brückenligand. Mit NbF5 und TaF5 reagiert er darüber hinaus unter Fluoridsubstitution zu Tetrafluoro- und Trifluorokomplexen: [MF4(μ-L)]2 und MF3(η2-L)(OPh) bzw. μ-O[MF3(η2-L)]2 (M = Nb, Ta). SbF5 bildet keine Substitutionskomplexe. Die Konstitutions- und Konformationsaussagen beruhen auf NMR-spektroskopischen Befunden.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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