Coordination Compounds 1 Question 20
####20. Statement I The geometrical isomers of the complex $\left[M\left(NH _3\right) _4 Cl _2\right]$ are optically inactive.
Statement II Both geometrical isomers of the complex $\left[M\left(NH _3\right) _4 Cl _2\right]$ possess axis of symmetry.
$(2008,3 M)$
Passage Based Question
Passage
The coordination number of $Ni^{2+}$ is 4 .
$$ NiCl _2+KCN \text { (excess) } \longrightarrow A \text { (cyano complex) } $$
$NiCl _2+$ conc. $HCl$ (excess) $\longrightarrow B$ (chloro complex)
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Solution:
- Both statements are true. However, axis of symmetry is not a criteria of optical isomerism. Optical inactivity of the two geometrical isomers of $\left[M\left(NH _3\right) _4 Cl _2\right]$ is due to the presence of plane of symmetry.
