Abstract
IR,31P NMR and19F NMR spectroscopy was used to study triphenylphosphinimines with substituants at the nitrogen atom and their complexes with boron trifluoride. In the case of aryl or benzyl substituants, BF3 adds to the nitrogen atom, while the state of the phosphorus atom is close to phosphonium. An analogous structure of the intermediate complexes is proposed upon the catalysis of the imide-amide rearrangement by BF3. The introduction of acyl groups such as phosphoryl, thiophosphoryl, and methanesulfonyl groups to the nitrogen atom of the triphenylphosphinimine alters the site of attachment of BF3, which is found at the oxygen atoms of the P-O or SO2 groups or to the sulfur atom of the P-S group.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 713–718, March, 1991.
The authors express their deep gratitude to M. G. Galakhov for taking and interpreting the19F NMR spectra.
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Gilyarov, V.A., Matrosov, E.I. & Kabachnik, M.I. Complexes of imidophosphoric compounds with BF3 . Russ Chem Bull 40, 628–633 (1991). https://doi.org/10.1007/BF00958009
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DOI: https://doi.org/10.1007/BF00958009