MCQ
Select the complex in which metal have primary valency $= 2$, secondary valency $= 4$ and shows stereo-isomerism :
- A$PtCl_2.4NH_3$
- B$PtCl_4.2NH_3$
- ✓$PtCl_2.2NH_3$
- D$PtCl_2.3NH_3$
✓
Answer
Correct option: C.
$PtCl_2.2NH_3$
c
Primary valency is the number of ions required to satisfy the charge on the metal ion. Secondary valency is the number of ions of molecules that are coordinated to the metal ion.
Primary valency is the number of ions required to satisfy the charge on the metal ion. Secondary valency is the number of ions of molecules that are coordinated to the metal ion.
Coordination number of $\mathrm{Pt}$ in $\mathrm{PtCl}_{2} \cdot 2 \mathrm{NH}_{3}$ is $4,$ which are satisfied by $2 \mathrm{Cl}$ and $2 \mathrm{NH}_{3}$.
Hence, it does not have any primary valency and has 4 secondary valency.
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