Discuss the free radical mechanism of addition of HBr to propene.
Or
Give the mechanism of addition of HBr to propylene in the presence of peroxide.
The addition of HBr to propene yields 2-broniopropane, while in the presence of benzoyl peroxide, the same reaction yields 1-bromopropane. Explain and give mechanism.
Why peroxide effect is shown only by HBr and not by HCl or HI?
Or
Explain why Kharasch effect is shown by HBr only and not by HCl or HI.
What is ozonolysis? What is its significance?
Significance: Ozonolysis is quite useful to locate the position of the double bond in an unknown alkene. This is done as shown below:
(i) Write the structures of the products (aldehydes or ketones or both) with carbonyl groups facing each other.
(ii) Remove oxygen atoms from carbonyl carbon and connect them by a double bond. For example, suppose the products of ozonolysis are ethanal and propanone.
Write IUPAC names of the products obtained by the ozonolysis of the following compounds:
Pent - 2-ene
Write IUPAC names of the products obtained by the ozonolysis of the following compounds:
3, 4-Dimethlhept-3-ene