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Question
Which of the following pairs of ions are isoelectronic and isostructural?
Options
\[\ce{CO^{2-}_3, NO^-_3}\]
\[\ce{ClO^-_3, CO^{2-}_3}\]
\[\ce{SO^{2-}_3, NO^-_3}\]
\[\ce{ClO^-_3, SO^{2-}_3}\]
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Solution
\[\ce{CO^{2-}_3, NO^-_3}\]
Explanation:
\[\ce{CO^{2-}_3}\] and \[\ce{NO^-_3}\] are isoelectronic (32 electrons) and Planar.
\[\begin{array}{cc}
\ce{O}\\
||\\
\ce{C}\\
/\phantom{.}\backslash\\
\ce{^ΘO}\phantom{..}\ce{O^Θ}
\end{array}\]
and
\[\begin{array}{cc}
\ce{O}\\
||\\
\ce{N}\\
/\phantom{.}\backslash\\
\phantom{..}\ce{O}\phantom{..}\ce{O^Θ}
\end{array}\]
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