Solvent effects on compounds of formula (X-CH,-CH,),O with X = C1, Br, I have been studied. The rotamer ratios have been determined for each solvent according to Lin's method and it is shown that the three compounds moved togauche forms when increasing the medium dielectric constant.Additionally, it is shown that gerniml couplings of the iodine derivative algebraically decrease on increasing the medium polarity. An attempt to correlate these variations with rotamer populations is made.