How does HBr add across a double bond? Predict the regiochemistry when HBr is reacted with 2-methylpropene

When HBr is dissolved in solution it dissociates in its two major components: H+ and Br-. The acidic environment promotes nucleophilic of the alkenes to the electrophilic protons to form an intermediate carbocation. The carbocation is the subsequently quenched by nucleophilic attack of the bormide ion to give the desired product. When predicating the regiochemistry for the addition of HBr into alkenes, the H+ will added to the carbon atom that generates the most sable carbocation – Markovnikov’s rule. Therefore the addition of HBr to 2-methylpropene would give 2-bromo-2-methylpropane.

Answered by Ryan M. Chemistry tutor

2480 Views

See similar Chemistry A Level tutors

Related Chemistry A Level answers

All answers ▸

Define the term 'Bronsted-Lowry acid'


A chemist synthesised two solutions A and B, they know one solution is an aldehyde and the other a ketone. Suggest how the chemist could identify which is which and describe any observations they would make


Explain, in the context of catalysis, the term heterogeneous and describe the first stage in the mechanism of this type of catalysis.


what is electronegativity and explain the trend in electronegativity as we go down the group?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences