New fluorinated thiols RF (CH2) pSH and disulfides [RF (CH2) pS] 2 containing a butylic spacer (p= 4) between the perfluorinated part and the thiol (or disulfide) function were easily obtained in good yields with a purity higher than 98%. This allows us to obtain homologues (p> 4) for their use as synthetic intermediates or as constituents for molecular organized systems.