Abstract The reactions of functionalized fluoro-olefins, CF 2= CFX (X=− SiMe 3,− SO 2 OSiMe 3) and CF 2= C (CF 3) X (X=− OSiMe 3,− OSO 2 OSiMe 3), with CH 3 CH 2 OH, H 2 O, SO 3 and SO 2 FCF 2 C (O) F, have been investigated. The influence of the trimethylsilyl group on the olefins changes their molecular properties; rather than an attack at the double bond fission of the C-Si or O-Si bond occurs in most of the reactions. With metal fluorides ...