Question

The one that is not expected to show isomerism is :

• A. $\left[ Ni \left( NH _{3}\right)_{4}\left( H _{2} O \right)_{2}\right]^{2+}$
• B. $\left[ Ni \left( NH _{3}\right)_{2} Cl _{2}\right]$
• C. $\left[ Pt \left( NH _{3}\right)_{2} Cl _{2}\right]$
• D. $\left[ Ni ( en )_{3}\right]^{2+}$

Answer 1

Answer: (B)

$\left[ Ni \left( NH _{3}\right)_{2} Cl _{2}\right]$ is tetrahedral complex, therefore does not show geometrical and optical isomerism.

$\left[ Ni \left( NH _{3}\right)_{2} Cl _{2}\right]$ does not show structural isomerism

$\left[ Ni \left( NH _{3}\right)_{4}\left( H _{2} O \right)_{2}\right]^{2+} \&\left[ Pt \left( NH _{3}\right)_{2} Cl _{2}\right]$ show geometrical isomerism

$\left[ Ni ( en )_{3}\right]^{2+}$ show optical isomerism