SDN Members don't see this ad. (About Ads) Quick question/clarification about protic v aprotic solvents I know from what I have read that SN1 likes polar protic while SN2 likes polar aprotic solvents. I am confused when in Kaplan books under the SN1 reactions it says a good polar solvent for this reaction is water/acetone. My question is, isn't acetone a polar aprotic solvent and therefore good for SN2 and not SN1? I'm just confused between the two and which is good for which reaction.