Question

In the molecular orbital diagram for $O_2^{+}$ ion, the highest occupied orbital is:

• A. $\sigma$ MO orbital
• B. $\pi$ MO orbital
• C. ${\pi }^{\ast }$ MO orbital
• D. ${\sigma }^{\ast }$ MO orbital

Answer 1

Answer: (C)

${\pi }^{\ast }$ MO orbital

As it can be seen from the given structures that in the molecular orbital diagram for $O_2^{+}$ ion, the highest occupied orbital is ${\pi }^{\ast }$ MO orbital.