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  2. Please,please help me In which of the following processes , the bond order has increased and paramagnetic charecter has changed to diamagnetic ?
# Engineering

In which of the following processes , the bond order has increased and paramagnetic charecter has changed to  diamagnetic ?

  • Option 1)

    N_{2}\rightarrow N_{2}\: ^{+}

  • Option 2)

    O_{2}\rightarrow O_{2}^{2-}

  • Option 3)

    O_{2}\rightarrow O_{2}\: ^{+}

  • Option 4)

    NO\rightarrow NO^{+}

Answers (1)
A admin

 

 

Bond Order -

 

Bond order is defined as one half the difference between the number of electrons present in the bonding and the antibonding orbitals.

- wherein

Bond \:Order=\frac{N_{b}-{N_{a}}}{2}

 

   

 

Magnetic behaviour of molecule -

If  all the molecular orbitals in a molecule are doubly occupied, the substance is diamagnetic

- wherein

However if one or more molecular orbital are singly occupied it is paramagnetic e.g. O2

Using the bond order and unpaired electrons 

(1)N_{2}\rightarrow N_{2}^{\bigoplus };3\rightarrow 2.5;Daimagnetic\rightarrow Paramagnetic

(2)O_{2}\rightarrow O_{2}^{- };2\rightarrow 1 ; Para\rightarrow Dia

(3)NO\rightarrow NO^{+};2.5\rightarrow 3 ; Para\rightarrow Dia (Increased)

(4)O_{2}\rightarrow O_{2}^{+};2\rightarrow 2.5 ; Para\rightarrow Para

 


Option 1)

N_{2}\rightarrow N_{2}\: ^{+}

Option 2)

O_{2}\rightarrow O_{2}^{2-}

Option 3)

O_{2}\rightarrow O_{2}\: ^{+}

Option 4)

NO\rightarrow NO^{+}

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