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Question

Which species has a bond order of 2.5 and is paramagnetic?

Options

Choose one · Correct answer highlighted

Explanation

For NO : (sigma 1s)² (sigma^* 1s)² (sigma 2s)² (sigma^* 2s)² (sigma 2pz)² (pi 2px)² (pi 2py)² (pi^* 2px)¹ . Bonding = 10, antibonding = 5. Bond order = (10 - 5/2) = 2.5 , with 1 unpaired electron (paramagnetic).