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  • Which of the following statements is correct about the bond order of  <img alt="\mathrm{C}_2{ }^{2-} \text { ? }" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathrm%7BC%7D_2%7B%20%

Which of the following statements is correct about the bond order of  \mathrm{C}_2{ }^{2-} \text { ? }

Option: 1

The bond order is 2.


Option: 2

The bond order is 3.


Option: 3

The bond order is 1.
 


Option: 4

The bond order cannot be determined.


Answers (1)

best_answer

The molecular orbitals model predicts that \mathrm{C}_2{ }^{2-} has a bond order of 3 . This is because the acetylide ion has a triple bond between the two carbon atoms, which is two sigma bonds and one pi bond. The similar C-C distances in acetylene \mathrm{\left(\mathrm{C}_2 \mathrm{H}_2\right)} and calcium carbide \left(\mathrm{CaC}_2\right) also support this prediction.

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Rakesh

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