Question

1. Addition of HBr to an alkene: . major product Predict the mechanism:

Answer 1

In this reaction,Markovnikov's rule will be applied

H- 8T, 3 bromo Smethyl pentane. Mechanism: Step 1: Protonation of alkene. In this step, H-By bond will break, bromine will take electron of hydrogen, which results ft formation. This it. attacks alkene according to Maskovnikov sule. - C-H - step 2: Due to step 1, 3 carbocation is formed, now. - Br will be added to this carbo cation

It states that when an asymmetric alkene is reacted with Protic acid(HX- where X is any halogen), then addition reaction takes place in such a way that hydrogen gets attached to that carbon in alkene which has more number of hydrogen attached to it while the halogen will be added to that carbon in alkene,where alkyl group is connected more.

therefore major product name will be 3-bromo 3-methyl pentane