SATHEE: Chemical Bonding And Molecular Structure Question 368

Chemical Bonding And Molecular Structure Question 368

Question: In $O_{2}^{-},$

$O_{2}$ and $O_{2}^{- 2}$ molecular species, the total number of antibonding electrons respectively are [DCE 2003]

Options:

A) 7, 6, 8

B) 1, 0, 2

C) 6, 6, 6

D) 8, 6, 8

Show Answer

Answer:

Correct Answer: A

Solution:

Molecular orbital electronic configuration of these species are : $O_{2}^{-} (17 e^{-}) =$

$σ 1 s^{2} σ^{*} 1 s^{2}, σ 2 s^{2} σ^{*} 2 s^{2}, σ 2 p_{x}^{2}, π 2 p_{y}^{2},$

$π 2 p_{z}^{2}, π^{*} 2 p_{y}^{2} π^{*} 2 p_{z}^{1}$

$O_{2} (16 e) =$

$σ 1 s^{2} σ^{*} 1 s^{2}, σ 2 s^{2} σ^{*} 2 s^{2}, σ 2 p_{x}^{2}, π 2 p_{y}^{2},$

$π 2 p_{z}^{2} π^{*} 2 p_{y}^{1} π^{*} 2 p_{z}^{1}$

$O_{2}^{2 -} (18 e) =$

$σ 1 s^{2} σ^{*} 1 s^{2}, σ 2 s^{2} σ^{*} 2 s^{2}, σ 2 p_{x}^{2}, π 2 p_{y}^{2},$

$π 2 p_{z}^{2} π^{*} 2 p_{y}^{2} π^{*} 2 p_{z}^{2}$
Hence number of antibonding electrons are 7,6,and 8 respectively.

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Chemical Bonding And Molecular Structure Question 368

Question: In O2−,

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Answer:

Solution:

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Question: In $O_{2}^{-},$