Class 11th Chemistry Chemical Bonding and Molecular Structure Chemistry

If Hund's rule is violated, then which among the following will become diamagnetic from paramagnetic

Option 1 - <p>C<sub>2</sub></p>

Option 2 - <p>CN<sup>-</sup></p>

Option 3 - <p> <span class="mathml" contenteditable="false"> <math> <mrow> <msubsup> <mrow> <mi>N</mi> </mrow> <mrow> <mn>2</mn> </mrow> <mrow> <mo>−</mo> <mn>2</mn> </mrow> </msubsup> </mrow> </math> </span></p>

Option 4 - <p>BN</p>

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Alok Kumar Singh | Contributor-Level 10

4 months ago

Correct Option - 3

Detailed Solution:

If hunds rule is followed

${N_{2}}^{- 2} : σ 1 s^{2} σ^{*} 1 s^{2} σ 2 s^{2} σ^{*} 2 s^{2} σ 2 {p_{z}}^{2} π 2 {p^{2}}_{x} π 2 {p_{y}}^{2} π^{*} 2 {p_{x}}^{1} π^{*} 2 {p_{y}}^{1}$

If Hunds rule is not followed

${N_{2}}^{- 2} : σ 1 s^{2} σ^{*} 1 s^{2} σ 2 s^{2} σ^{*} 2 s^{2} σ 2 {p_{z}}^{2} π 2 {p^{2}}_{x} π 2 {p_{y}}^{2} π^{*} 2 {p_{x}}^{2}$

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