(Chlorodifluoromethyl)trimethylsilane (TMSCF2Cl, Me3SiCF2Cl) is used as an useful and promising source of difluorocarbene precursor for the synthesis of gem-difluorinated cyclopropanes and cyclopropenes from alkenes and alkynes and gem-difluoroolefination of carbonyl compounds.
Chloride ion-catalyzed generation of difluorocarbene for efficient preparation of gem-difluorinated cyclopropenes and cyclopropanes. 
Deoxygenative gem-difluoroolefination of carbonyl compounds with (chlorodifluoromethyl)trimethylsilane and triphenylphosphine.
 F.Wang, et al, Chem. Commun., 2011, 47(8), pp 2411-2413.
 F.Wang, et al, Beilstein J. Org. Chem., 2014, 10, pp 344-351.