Wiley InterScience Backfile Collection 1832-2000
Chemistry and Pharmacology
The N,N,N′-trimethylethylenediaminetetrafluorophosphate, 4, was formed in the unusual reaction of N,N,N′-trimethyl-N′-trimethylsilylethylenediamine, 1, with the N—P-bonded tetrafluorophosphoranes, dimethylaminotetrafluorophosphorane, 2, or morpholinotetrafluorophosphorane, 3. There was no evidence for the cleavage of a P—F bond in the tetrafluorophosphoranes (with formation of Me3SiF); instead, the Si—N compounds, R2N—SiMe3 (R2 = Me2 or O(CH2CH2)2) were formed. The 19F and 31P NMR spectra of 4 at room temperature indicated dynamic behavior. The X-ray crystal structure analysis of 4 revealed the presence of a five-membered ring, formally as a result of intramolecular donor-acceptor interaction (P—N = 196.5 pm) between the nitrogen atom of the Me2N group and phosphorus.
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