Draw the molecular orbital energy diagram for oxygen molecule (O2) and show that:(i) It has a double bond(ii) It has paramagnetic character. - Zigya
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Draw the molecular orbital energy diagram for oxygen molecule (O2) and show that:
(i) It has a double bond
(ii) It has paramagnetic character.


Electronic structure of oxygen atom is  Leaving out the 4 electrons in the 1s orbitals of two oxygen atoms constituting the molecule (represented as KK), the molecular orbital energy diagram for remaining 12 electrons of oxygen as molecule is shown:


(i) Electronic configuration:


(ii) Bond order: Here Nb = 8;    Na = 4

The two oxygen atoms in a molecule of oxygen are united through two covalent bonds (i.e.  a double bond).

(iii) Paramagnetic character : Since a molecule of oxygen has two unpaired electrons in the  orbitals, molecular oxygen should be paramagnetic.
 
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