Donor-free bis(trifluoromethyl) cadmium, (CF3)2Cd: a readily available low-temperature difluorocarbene source

C6F5XeF, a versatile starting material in xenon–carbon chemistry

“…À25 8C ( 19 F À39.4, s, 2 J(F, 111 Cd) 508, 2 J(F, 113 Cd) 519 Hz [15]. C 6 F 5 SiMe 3 was obtained from C 6 F 5 MgBr and Me 3 SiCl in Et 2 O, C 6 F 5 SiF 3 from the reaction of C 6 F 5 SiCl 3 and SbF 3 [16].…”

Synthesis of gem‐Difluorinated Cyclopropanes and Cyclopropenes: Trifluoromethyltrimethylsilane as a Difluorocarbene Source

“…[13] For substrates that are thermally unstable, the abovementioned methods and reagents could be a serious limitation, and development of better difluorocarbene precursors that can generate difluorocarbenes at lower temperatures is required. There are only few reports [14] that discuss difluorocarbene generation at room temperature with Ph 3 P/CF 2 Br 2, [15] or at low temperatures (below À78 8C) with bis(trifluoromethyl) cadmium, which is a highly pyrophoric reagent, as a source. Again, the use of cadmium or phosphines and the lack of commercial availability of these reagents is a severe limitation.…”

On the Chemistry of Fluoroorgano Derivatives of Group 13 Elements. 1 The Reactions of Perfluoroiodoalkanes and Pentafluoroiodobenzene with Triethylindium - Synthesis and Characterization of In(C2H5)2(C6F5) · N(C2H5)3 and In(C2H5)2(i-C3F7) · N(C2H5)3 and Spectroscopic Evidence for Bis(3,3,4,4,4-pentafluorobutyl)indium Iodide

“…CCl 3 F was used as an external standard in the 19 F-NMR spectra. The signals of the deuterated solvents were used as internal standards in the 1 H-and 13 C-NMR spectra and referenced to Si(CH 3 ) 4 . Mass spectra were recorded on a modified Varian MAT CH5 spectrometer.…”

“…The reactions of the higher perfluoroiodoalkanes with Cd(CH 3 ) 2 proceed selectively and quantitatively without any base present [3], whereas reactions with CF 3 I [4] and C 2 F 5 I [5] gave an incomplete exchange or yielded a great number of by-products. However, use of Cd(C 2 H 5 ) as a starting material allowed the synthesis of donor-free Cd(CF 3 ) 2 [4].…”