The nitrosyl ion, NO⁺, has an interesting chemistry. Assume the molecular orbital diagram shown in Figure 9.16 applies to NO⁺.
(a) Is NO⁺ diamagnetic or paramagnetic? If paramagnetic, how many unpaired electrons does it have?
(b) What is the highest-energy molecular orbital (HOMO) occupied by electrons?
(c) What is the nitrogen–oxygen bond order?
(d) Is the N—O bond in NO+ stronger or weaker than the bond in NO?

Data given in Figure 9.16

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ENERGY 2p 2p 2p 2s 1s atomic orbitals 2p 2p OF 25 015 molecular orbitals for B₂, C₂, and N₂ 2p 2p 2p 25 1s atomic orbitals (a) Energy level diagram for B2, C₂, and N₂. For O₂ and F2, the 2p MO is lower in energy than the T2p MOS. 3 σ 20 T2P 020 TT 20 0 25 0525 N₂ molecular orbitals (b) Computer-generated molecular orbitals for N₂. Color scheme: occupied MOs are blue/green. Unoccupied MOs are red/ yellow. The different colors in a given orbital reflect the different phases [positive or negative signs] of the wave functions.