Name: Types of Intermolecular Forces
Uploaded: 2019-07-19
Duration: 8 min 7 s
Description: An intermolecular force mediates the interaction between molecules, including the forces of attraction or repulsion, which act between atoms and molecules.

Question

Write down the molecular orbital diagram of

O_{2}, O_{2}^{-}

(superoxide),

O_{2}^{2 -} (peroxide)

and

O_{2}^{+} .

Find out their bond order, magnetic properties and stability.

Accepted Answer

Bond order is directly proportional to the stability, means higher bond order also has a higher stability.

Paramagnetic compounds have unpaired electrons in the outermost orbital, while in diamagnetic compounds, the electrons all have paired spins.

Molecular orbital diagram of $O_{2}$ :

Molecular orbital $O_{2}^{+}$ :

Molecular orbital diagram of $O_{2}^{-}$ :

Species Number of electrons Molecular orbital configuration Bond order Stability Magnetic nature

$O_{2}^{+}$ $15$ ${(σ 1 s)}^{2} {(σ^{*} 1 s)}^{2} {(σ 2 s)}^{2} {(σ^{*} 2 s)}^{2} {(σ 2 p_{x})}^{2} {(π 2 p_{y})}^{2} {(π 2 p_{z})}^{2} {(π^{*} 2 p_{y})}^{1}$ $\frac{1}{2} (10 - 5) = 2.5$
Decreases

$↓$
Para-magnetic

$O_{2}$ $16$ ${(σ 1 s)}^{2} {(σ^{*} 1 s)}^{2} {(σ 2 s)}^{2} {(σ^{*} 2 s)}^{2} {(σ 2 p_{x})}^{2} {(π 2 p_{y})}^{2} {(π 2 p_{z})}^{2} {(π^{*} 2 p_{y})}^{1} {(π^{*} 2 p_{z})}^{1}$ $\frac{1}{2} (10 - 6) = 2.0$ Para-magnetic

$O_{2}^{-}$ $17$ ${(σ 1 s)}^{2} {(σ^{*} 1 s)}^{2} {(σ 2 s)}^{2} {(σ^{*} 2 s)}^{2} {(σ 2 p_{x})}^{2} {(π 2 p_{y})}^{2} {(π 2 p_{z})}^{2} {(π^{*} 2 p_{y})}^{2} {(π^{*} 2 p_{z})}^{1}$ $\frac{1}{2} (10 - 7) = 1.5$ Para-magnetic

$O_{2}^{2 -}$ $18$ ${(σ 1 s)}^{2} {(σ^{*} 1 s)}^{2} {(σ 2 s)}^{2} {(σ^{*} 2 s)}^{2} {(σ 2 p_{x})}^{2} {(π 2 p_{v})}^{2} {(π 2 p_{z})}^{2} {(π^{*} 2 p_{y})}^{2} {(π^{*} 2 p_{z})}^{2}$ $\frac{1}{2} (10 - 8) = 1.0$ Dia-magnetic

Bond order $\propto \frac{1}{Bond length}$

Bond order: $O_{2}^{+} > O_{2} > O_{2}^{-} > O_{2}^{2 -}$

Bond length: $O_{2}^{+} > O_{2} < O_{2}^{-} < O_{2}^{2 -}$

Write down the molecular orbital diagram of $O_{2}, O_{2}^{-}$ (superoxide), $O_{2}^{2 -} (peroxide)$ and $O_{2}^{+} .$ Find out their bond order, magnetic properties and stability.

Important Questions on Chemical Bonding and Molecular Structure

Learn and Prepare for any exam you want !

Write down the molecular orbital diagram of O2,O2- (superoxide), O22-( peroxide ) and O2+. Find out their bond order, magnetic properties and stability.

Important Questions on Chemical Bonding and Molecular Structure

Learn and Prepare for any exam you want !

Write down the molecular orbital diagram of $O_{2}, O_{2}^{-}$ (superoxide), $O_{2}^{2 -} (peroxide)$ and $O_{2}^{+} .$ Find out their bond order, magnetic properties and stability.