Many different kinds of electrophilic additions to alkenes take place.Forexample,alkeneadd HO-CL or HO-BR under suitable condition to yield 1,2-halo alcohols,calledhalohydrins.Halohydrin formation doesn’t take place by direct reaction of an alkene with HOBr or HOCl,however.Rather the addition is done indirectly by reaction of the alkene with either Br2 or Cl2 in the presence of water.