E )- 2 3 dimethyl 2 pentene July 8, 2019 16 32 64 128 E )- 1 chloro 2 3 dimethyl 2 pentene E )- 2 bromo 3 4 dimethyl 2 pentene 2 3-dimethyl-2-pentene 2 3-dimethylpent-2-ene 2 3-dimethyl-1-pentene 2 3-dimethylpent-1-ene