≈R–X,whereXisahalide,ie.theclassofalkylhalides. AttackofenolateC - onR-XisanS N 2substitution. ForgoodS N 2substitutions,R=methyl,primary>secondary >>tertiary R=primary, areparticularlyreactive ForgoodS N 2substitutions,goodleavinggroupabilityis whereX=I - >Br - >Cl - 2.SimilartoR-Xisthe...