1) Draw the molecular orbital diagram of C₂.

2) What is the electron configuration of C and C₂?

3) Draw a Lewis structure of C₂ consistent with the molecular orbital diagram.

4) What are the magnetic properties of C₂?

5) Compare the bond length and bond energy of C₂ and N₂.

Question

1) Draw the molecular orbital diagram of C₂.

2) What is the electron configuration of C and C₂?

3) Draw a Lewis structure of C₂ consistent with the molecular orbital diagram.

4) What are the magnetic properties of C₂?

5) Compare the bond length and bond energy of C₂ and N₂.

| General Chemistry 1

Accepted Answer

1)

2) C : 1s²2s²2p²

C₂ : (σ_1s)²(σ*_1s)²(σ_2s)²(σ*_2s)²(π_2p)⁴

3) Bond order: (6-2) / 2 = 2

4) no unpaired electrons ⇒ C₂ is diamagnetic

5) N₂ : (σ_1s)²(σ*_1s)²(σ_2s)²(σ*_2s)²(π_2p)⁴(σ_2p)²

Bond order: (8-2) / 2 = 3

N₂ is a triple bond while C₂ is a double bond
⇒ bond length of N2 < bond length of C2
⇒ bond energy of N₂ > bond energy of C₂

Final - Question 3 | General Chemistry 1