Practice question
Question
Which molecule has a bond order of 2 and is diamagnetic?
Explanation
For C₂ : (sigma 1s)² (sigma^* 1s)² (sigma 2s)² (sigma^* 2s)² (pi 2px)² (pi 2py)² . Bonding = 8, antibonding = 4. Bond order = (8 - 4/2) = 2 , with all electrons paired (diamagnetic).
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