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Using MO theory, predict which of the following species has the shortest bond length?
- O2+
- O2−
- O2²−
- O2²+
Correct answer: O2²+
Solution
Bond orders: O2+ = 2.5, O2- = 1.5, O2(2-) = 1.0, O2(2+) = 3.0. The highest bond order, O2(2+) with BO = 3, has the shortest bond length.
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