Restrict attention to B₂, C₂, N₂, O₂ and F₂ in the usual ground-state MO model. Define "σ-only" or "π-only" by the NET σ and π bond orders after cancelling occupied bonding/antibonding orbitals, not b

Question

Restrict attention to B₂, C₂, N₂, O₂ and F₂ in the usual ground-state MO model. Define "σ-only" or "π-only" by the NET σ and π bond orders after cancelling occupied bonding/antibonding orbitals, not by the absence of occupied orbitals. Which existence claims are true within this restricted set?

TestHub · Accepted Answer

B₂ has net σ order0 and π order1 with two unpaired electrons, giving A. C₂ has net σ0 and π2 with paired electrons, giving B. F₂ has net σ1 and π0 and is diamagnetic, giving C. N₂ has σ1+π2 and O₂ has σ1+π1, so neither is σ-only; no member of the restricted set supplies D. Occupied σ core orbitals do not invalidate a zero NET σ contribution.

Chemistry - CHEMICAL BONDING Question with Solution | TestHub

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