Can someone pls explain to me how electrons influence reaction mechanisms and how knowledge of these reaction mechanisms can be harnessed in predicting the product of chemical reactions and their possible effect on the environment?
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how do electrons drive reaction mechanisms? watch
- Thread Starter
- 10-11-2008 12:32
- 13-11-2008 17:15
Enviroment - can't help.
However, you can think of the likelyhood of a reaction due to three (very crude without QM) factors:
electron-electron repulsion, nuclear nuclear repulsion, and electron nuclear attraction. You can use coloumbs laaw to predict nuclear nuclear repulsion, but nuclear electron and electron electrorn repulsion is musch harder. However, it turns out thesse two can be very easily approximated by taking the two reactants (one step at a time) and looking at the energy to hold the electrons in their potential well - which will give you the nergy when they are at infinity. You can then do it for when the two reactants are at zero distance apart - i.e. the nuclei combine. You then find out the nuclear electron attraction bby consulting the energy required to hold all the elctrons in the potential well of a molecule/atom with a new atomic number.
Using mechanisms to predict reactions isn't very wise if you cana do the experiment though. If you do it you can use kinetics to more accurately check what is happeneing.