According to MO theory the bond orders for O 2 2 - , CO and NO + respectively, are [2023]

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Q.
According to MO theory the bond orders for $O_{2}^{2 -}$ , CO and ${NO}^{+}$ respectively, are [2023]

1 1, 3 and 3

2 2, 3 and 3

3 1, 2 and 3

4 1, 3 and 2

Ans.
(1)

Species Molecular Orbital configuration Bond order = $\frac{1}{2} (N_{b} - N_{a})$

$CO$ $KK$ ${}^{}σ_{2 s}^{2} σ_{2 s}^{ 2} (π_{2 p_{x}}^{2} \equiv π_{2 p_{y}}^{2}) σ_{2 p_{z}}^{2}$ $\frac{1}{2} (10 - 4) = 3$

${NO}^{+}$ $KK$ ${}^{}σ_{2 s}^{2} σ_{2 s}^{ 2} σ_{2 p_{z}}^{2} (π_{2 p_{x}}^{2} \equiv π_{2 p_{y}}^{2}) (π_{2 p_{x}^{0}}^{} \equiv π_{2 p_{y}^{0}}^{})$ $\frac{1}{2} (10 - 4) = 3$

$O_{2}^{- 2}$ $KK$ ${}^{}σ_{2 s}^{2} σ_{2 s}^{ 2} σ_{2 p_{z}}^{2} (π_{2 p_{x}}^{2} \equiv π_{2 p_{y}}^{2}) (π_{2 p_{x}}^{* 2} \equiv π_{2 p_{y}}^{* 2})$ $\frac{1}{2} (10 - 8) = 1$

Solution

Q.
According to MO theory the bond orders for $O_{2}^{2 -}$ , CO and ${NO}^{+}$ respectively, are [2023]

1 1, 3 and 3

2 2, 3 and 3

3 1, 2 and 3

4 1, 3 and 2

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Species	Molecular Orbital configuration	Bond order = $\frac{1}{2} (N_{b} - N_{a})$
$CO$	$KK$ ${}^{}σ_{2 s}^{2} σ_{2 s}^{ 2} (π_{2 p_{x}}^{2} \equiv π_{2 p_{y}}^{2}) σ_{2 p_{z}}^{2}$	$\frac{1}{2} (10 - 4) = 3$
${NO}^{+}$	$KK$ ${}^{}σ_{2 s}^{2} σ_{2 s}^{ 2} σ_{2 p_{z}}^{2} (π_{2 p_{x}}^{2} \equiv π_{2 p_{y}}^{2}) (π_{2 p_{x}^{0}}^{} \equiv π_{2 p_{y}^{0}}^{})$	$\frac{1}{2} (10 - 4) = 3$
$O_{2}^{- 2}$	$KK$ ${}^{}σ_{2 s}^{2} σ_{2 s}^{ 2} σ_{2 p_{z}}^{2} (π_{2 p_{x}}^{2} \equiv π_{2 p_{y}}^{2}) (π_{2 p_{x}}^{* 2} \equiv π_{2 p_{y}}^{* 2})$	$\frac{1}{2} (10 - 8) = 1$

Solution

Q. According to MO theory the bond orders for O22-, CO and NO+ respectively, are [2023]

1 1, 3 and 3

2 2, 3 and 3

3 1, 2 and 3

4 1, 3 and 2

Ans. (1) Species Molecular Orbital configuration Bond order = 12(Nb-Na) CO KK σ2s2*σ2s*2(π2px2≡π2py2)σ2pz2 12(10-4)=3 NO+ KK σ2s2*σ2s*2σ2pz2(π2px2≡π2py2)(π2px0*≡π2py0*) 12(10-4)=3 O2-2 KK σ2s2*σ2s*2σ2pz2(π2px2≡π2py2)(π2px*2≡π2py*2) 12(10-8)=1

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Q.
According to MO theory the bond orders for $O_{2}^{2 -}$ , CO and ${NO}^{+}$ respectively, are [2023]