What alkene should be used to synthesize 3-bromohexane? How can I explain the carbocation process?

Question

Skylar Alexander · Accepted Answer

You can start with 3-hexene. Since the molecule is symmetrical through its double bond, it doesn't matter whether you add #Br# to carbon 3 or 4. You will get the same thing. Neither carbon (3 or 4) has more protons than the other. From here, all you need to know is that since there is only one #-Br# on the product, it must be a hydrobromination of the appropriate alkene.  Additionally, since the finished product lacks an isomeric specification, it makes no difference if you use (Z)- or (E)-3-hexene. #H_3C CH_2(HC=CH)CH_2CH_3 + HBr -> H_3C CH_2(HCBr-CH_2)CH_2CH_3# The carbocation intermediate forms after the nucleophilic alkene donates its #pi# electrons to grab the proton from #HBr# (the electrophile), and then #Br^-# acts as a nucleophile and donates electrons to attach onto the carbocationic center.

Ella Allen · Answer

undefined Use 1-hexene for synthesizing 3-bromohexane. Carbocation process involves the formation of a carbocation intermediate during electrophilic addition reactions in alkenes, where the double bond's pi electrons attack an electrophile, leading to the formation of a positively charged carbon.