Q30 / 160 · AP EAMCET 2023 (18 May Shift 2) · Chemistry
Which of the following types of isomerism is exhibited by
$$
\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{NO}_2\right)\right]\left(\mathrm{NO}_3\right)_2
$$
i. Optical ii. Linkage iii. Ionization
iv. Coordination
- Correct answerAii, iii only
- Bi, ii, iii only
- Ci, iii only
- Dii, iv only
Solution
No optical isomerism is exhibited by the given complex as there is a plane of symmetry.
Linkage isomers :-
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{NO}_2\right)\right]^{2+}$ and $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5(\mathrm{ONO})\right]^{2+}$
Ionization isomers:-
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{NO}_2\right)\right]^{2+}$ and $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{NO}_3\right)\right]^{+}$
For coordination isomerism, both, cationic and anionic entities are required.
Hence, the correct answer is option: 'A'.