F332 reaction mechanisms for the atmosphere
In the spec it says that you should be able to:
- describe the difference between homolytic and heterolytic bond fission and recognise examples;
- recall the formation, nature and reactivity of radicals and explain the mechanism of a radical chain reaction involving initiation, propagation and termination;
- use a radical mechanism as a model to explain the reaction of alkanes with halogens a radical chain reaction in the presence of UV radiation to form halogenoalkanes);
- Created by: Lorna Mashongamhende
- Created on: 18-05-12 21:03
Difference between homolytic and heterolytic fissi
Heterolytic fission
The bond breaks unevenly where the electron bond pair can stick with one fragment and a positive and negative ion form.
where as in homolytic fission the bond breaks evenly here the bonding pair of electrons are equally divided between two highly reactive fragments called free radicals.
What is a radical?
Free radicals are characterised by having an unpaired electron not involved in a chemical bond.
It wants to pair up with another electron to form a stable bond - that's why free radicals are so reactive!
Comments
No comments have yet been made