2 3 dimethylbut 2 ene hbr July 8, 2019 16 32 64 128 2 3 dimethylbut 2 ene + hbr What happens when 2 3 dimethyl but 2 ene reacts with hbr 2 3-dimethylbut-2-en 2 3-dimethyl-2-butene 2 3-dimethylbutane 2 3-dimethyl-1-butene 2 metil 2 butena + h2