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jaisson simon Grade: 11
        

Sir,I am so thankful  to you for patiently clearing my doubts.


now can you explain (send) me Molecular orbital energy diagram of oxygen and nitrogen?

7 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

Dear jaisson


Nitrogen:


This molecule has ten electrons. The atomic orbitals combine to produce the following molecular orbital diagram


 


 


5732-1809_7662_nit.gif


 


Here the 2pg orbital is occupied by two electrons to give a total bond order of three. This corresponds well with the Lewis structure (), although the orbital approach tells us that there is one s and two p.


 


Oxygen:


This molecule has twelve electrons, two more than nitrogen - and these extra two are placed in a pair of degenerate pg orbitals. The atomic orbitals combine to produce the following molecular orbital diagram:


 


 


 



5732-1967_7662_o2ed.gif


 


Comparison of the above energy level diagram wit hthat for nitrogen - you can see that the 2sg level lies lower than pu. Here, we are starting to fill the anti-bonding orbitals originating from the p orbital interactions and so the bond order decreases from three to two.
The lowest energy arrangment (Hund's rule) - has a single electron, each with parallel spins, in each of the pgx and pgy orbitals. This produces a paramagnetic molecule, with a double bond and has two unpaired electrons.


 


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 All the best.
 
Regards,
Askiitians Experts
Badiuddin

7 years ago
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