Abstract The fluoride catalyzed addition of the 2, 2, 2,-trifluoronitroalkanes CF 3 CH 2 NO 2 (Ia) and CF 3 CH (CH 3) NO 2 (Ib) to activated carbon-carbon double bonds was applied to the synthesis of functionalized trifluoromethyl nitroalkanes CF 3 C (R) NO 2 C (R 1 R 2) CH (R 3) Y (II)(R= H, CH 3). The influence of steric and electronic factors on the formation of the adducts (II) was investigated via systematic variation of the activating group Y, and the ...