00:01
Mo diagram is the molecular orbital diagram of the molecules based on the linear combination of atomic orbitals.
00:08
Consider carbon c2 molecule where carbon atomic number is 6.
00:14
So all together in c2 molecule there are 12 electrons.
00:18
And now if you consider c2 plus, there will be only 11 electrons.
00:23
So if you try to fill the electrons into various bonding and anti -bonding orbits, we get sigma 1 s 2, sigma 1 s 2 star, sigma 2 s 2 star, then comes pi 2p x equal to pi 2 p y.
00:47
Because this follows the molecule which contains less than protein electrons.
00:54
So we first write pi 2 p to p y, then comes the sigma 2x.
01:00
So here since these two are equal energetic degenerate, we fill.
01:05
1 -1 electron till here 2 plus 2 4 6 8 9 10 11 this is the electronic configuration for c2 molecule and if you consider the bond order which is number of bonding electrons minus number of anti -bonding electrons byte this will be equal to bonding electrons are 2 to 4 5 6 7 so 7 minus 2 plus 2 4 by 2.
01:41
7 minus 4 is 3 by 2 is 1 .5 so in case of c2 plus molecule the bond order is 1 .5 now look at the diagram the same electronic configuration we fill in the form of diagram this way this is the increasing energy order of the orbitals so 1 s orbital 2 combined with 1 s orbital 2 electrons of other carbon.
02:14
This is the first carbon.
02:15
This is the second carbon.
02:17
So these two electrons combine with 2 s orbitals and form one bonding orbital, bonding molecular orbital and one anti -bonding molecular orbital.
02:32
So this would be sigma 1 s and this would be sigma 1 s star which is anti -bondent.
02:38
So fill two electrons in each one to one.
02:43
This is the configuration.
02:45
Similarly, look at 2s.
02:47
There are two electrons in one carbon, 2s, 2s, 2 electrons in the other carbon.
02:54
So they also combine to form 1 sigma 2s and 1 sigma 2s star.
03:08
This is because one bonding or molecular orbitals combine with one more bonding orbital to form.
03:15
To form two molecular orbitals...