Question

Which of the following pairs of ions are isoelectronic and isostructural?

Options

• \[\ce{CO^{2-}_3, NO^-_3}\]

• \[\ce{ClO^-_3, CO^{2-}_3}\]

• \[\ce{SO^{2-}_3, NO^-_3}\]

• \[\ce{ClO^-_3, SO^{2-}_3}\]

Answer 1

\[\ce{CO^{2-}_3, NO^-_3}\]

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

\[\begin{array}{cc}
\ce{O}\\
||\\
\ce{N}\\
/\phantom{.}\backslash\\
\phantom{..}\ce{O}\phantom{..}\ce{O^Θ}
\end{array}\]