MCQ
The correct sequence of bond order is
- A$O_2^- > O_2^+ > O_2$
- B$O_2^+ > O_2^- > O_2$
- C$O_2 > O_2^- > O_2^+$
- ✓$O_2^+ > O_2 > O_2^-$
${O_2} \to 2$
$O_2^ - \to 1.5$
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$O\left( g \right) + {e^ - } \to O_{\left( g \right)}^ - \,\,\,\,;\,\,\,\,{\Delta _f}{H^\Theta } = - 141\,kJ\,mo{l^{ - 1}}$
${O^ - }\left( g \right) + {e^ - } \to O_{\left( g \right)}^{2 - }\,\,\,\,;\,\,\,\,{\Delta _f}{H^\Theta } = + 780\,kJ\,mo{l^{ - 1}}$
Thus process of formation of $O_2^-$ in gas phase is unfavourable even thought $O_2^-$ is isoelectronic with neon. It is due to the fact that,
