ChemInform Abstract: CHEMIE DER TRIFLUORMETHYLSELENINSAEURE, REDOXPROZESSE IM F3CSE(O)‐O‐SCFNCL3‐N‐SYSTEM

Abstract

Die Reaktionen des Ag‐seleninats (I) mit den halogenierten Methansulfenylchloriden (II) bei niedrigen Temp. fuhren zu den Selenosulfen‐Verbindungen (III).

A New Route to Thio- and Selenosulfonates from Disulfides and Diselenides. Application to the Synthesis of New Thio- and Selenoesters of Triflic Acid

“…This strategy was successful (the results will be given in future papers), but first, we had to prepare such reagents. At the moment, only one perfluorinated trifluoromethaneselenosulfonate (CF 3 SO 2 SeCF 3 ) has been described (from a surprising isomerization of CF 3 Se(O)OSCF 3 ) and only few trifluoromethanethiosulfonates, essentially CF 3 SO 2 SPh and CF 3 SO 2 SCF 3 , have been synthesized. Another one (CF 3 SO 2 −S−CCl 2 −CO−NPh i Pr) has been claimed to exhibit herbicidal properties .…”

Synthesis and characterization of (trifluoromethyl) gold complexes

“…Indeed, Figure 1 (top) shows a well-separated doublet of quartets at -22.2 ppm with 3=/P_F = 79 Hz and VF_F = 8.1 Hz which we assign to the CF3 ligand trans to trimethylphosphine in 11c. Although there are no other bis (trifluoromethyl) compounds with inequivalent CF3 groups available for comparison, 4JF_F = 4.9 Hz in Hg(CF3)2 (measured from 13C satellites).22 Two (trifluoromethyl)selenium compounds, (CF3)SeCF2Cl and (CF3)SeCFCl2, have 4Jf.f values of 7.5 and 7.0 Hz,respectively.23,24 Finally, Figure 1 (bottom) shows a complex pattern which may be fit to an (exactly) overlapping doublet of quartets (denoted in the figure as quartets "a" and "b"), with VP_F = 16 Hz and VF_F = 8.1 Hz, at a chemical shift of -26.3 ppm. We assign this spectral feature to the trifluoromethyl group cis to PMe3 in 11c based on the small phosphorus-fluorine coupling.…”