Determination, by ESR Spectroscopy, of the Constitution of the Phosphorus Radicals Formed on Oxidation of Phosphorins

✍ Scribed by Prof. K. Dimroth; Dr. N. Greif; Dipl.-Chem. W. Städe; Dr. F. W. Steuber

• Publisher: John Wiley and Sons
• Year: 1967
• Tongue: English
• Weight: 211 KB
• Volume: 6
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.196707112

✦ Synopsis

one obtains the electronegativity XNSF, = 3.3. If one plots the mean P F frequency of the phosphoryl halides against the sum of the electronegativities, one obtains a linear dependence, whence the electronegativity of the NSF2 group again appears as 3.3. Compound (4) IS a clear liquid of b.p. 7 2 °C and m.p.

-70 "C and, as expected, is more stable than sulfur difluoride (fluorosulfony1)imide. The compound was characterized by elemental analysis and by its IR, IgF-NMR, and mass spectra. The mass spectrum shows, besides the molecular ion at m ' e = 183, the typical fragments M -F (164), FS02N (97), SOF2 (86), FS02 (83), FSO (67), S F (51), and SO (48).

The 19F-NMR spectrum shows a doublet at -45.4 and a triplet at -60.1 referred to CC13F as external standard; the coupling constant is JFF = 8 Hz. The IR spectrum (gas) in the NaCl region shows strong bands at 1475,