Question

Which alkene reacts fastest with Hbr ?
A) ch2=c(ch3)2
B) ch2=c(ch3)(och3)
C) ch2=c(ch3)(ch2och3)
Please choose the answer and explain y ? :)

Answer 1

In an electrophilic addition of HBr to an alkene, the rate is determined by the stability of the carbocation formed (\(3^o>2^o>1^o\)).

The reaction begins with the addition of \(H^+\) to one of the carbons forming the double bond, so being the reaction with this step to all your species and compare them.