mechanism of reaction of two equivalents of chlorobenzene on one equivalent of 2,2,2, tri chloro ethanal 1 in the presence of concentrated H2SO4 to give DDT
Step I) Addition of proton to 2,2,2-trichloro ethanal:
Step II) Attack of chlorobenzene on the electrophillic carbonly carbon of protonated 2,2,2-trichloro ethanal​.
Step III) step I and II are again repeated here i.e. addition of proton followed by removal of water molecule giving DDT, dichlorodiphenyltrichloroethane.
Step II) Attack of chlorobenzene on the electrophillic carbonly carbon of protonated 2,2,2-trichloro ethanal​.
Step III) step I and II are again repeated here i.e. addition of proton followed by removal of water molecule giving DDT, dichlorodiphenyltrichloroethane.