The first example of nucleophilic substitution with perfluoroalkyl Grignard reagents on the sp3 carbon centre is described. Thus, a series of organometals RF-MgBr, prepared from perfluorinated alkyl iodides RF-I with RF= C4F9, C6F13, C8F17, C10F21 and C12F25, reacted with 1, 3, 2-dioxathiolane-2, 2-dioxide to afford the corresponding 2-(perfluoroalkyl) ethyl magnesium sulfates, which were isolated after metathesis to the corresponding ...