ziirii 70. Geburtsiug ge widniet 2,4.6-Trisubstituierte Phosphorine ( l a ) -( l J ) uerden u.a. durch Quecksilber(ri)-acetat zu stabilen Radikal-Kationen oxidiert [ I r z l ; in Gegenwart von Alkoholen oder Phenolen cntstehen dabei unter Hg-Abscheidung die neuartigen. stark fluoreszierenden 1 ,l-Dialkoxy-oder 1 ,I-Diaryloxy-phosphorine ( 2 0 ) ~ (ZJ) als sehr bestandige. kristalline Verbindungen. Wahrscheinlich wird dabei die Kation-Radikalstufe, die sich ESR-spektroskopisch nachweisen IaBt, durchlaufen.
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, 1450, 1245, 888, 821, 740, and 716 cm-1, which are t o be ascribed t o stretching virations.
Zum Studium der bei der Oxidation von 2,4,6-Triarylphosphorinen entstehenden Radikale [I] haben wir aus den entsprechenden Pyryliumsalzen ( I ) die in der Tabelle aufgefiihrten neuen Phosphorine (2) nach Murkt[*l dargestellt und mit 2,4,6-Triarylphenoxylen, Blei(~v)-acetat oder -benzoat, Quecksilber(1x)-acetat oder anderen Oxidationsmitteln zu den in Losung sehr bestandigen Phosphor-Radikal-Kationen (3) oxidiert.
genation catalyzed by (Y), the stoichiometric hydrogenation by the readily accessible complexes ( 2 ) and (3) has the advantage that conjugated polyenes can be reduced stepwise.
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