Question

The one that is not expected to show isomerism is:

• A. ${\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_4{\left({\mathrm{H}}_2\mathrm{O}\right)}_2\right]}^{+2}$
• B. ${\left[\mathrm{Ni}{\left(\mathrm{en}\right)}_3\right]}^{+2}$
• C. $\left[\mathrm{Pt}{\left({\mathrm{NH}}_3\right)}_2{\mathrm{Cl}}_2\right]$
• D. $\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_2{\mathrm{Cl}}_2\right]$

Answer 1

The correct option is D

$\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_2{\mathrm{Cl}}_2\right]$

The explanation for the correct option:

D: $\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_2{\mathrm{Cl}}_2\right]$

Isomers:

• Isomers are types of chemical compounds that share the same chemical formula but have different characteristics and atom arrangements.
• As a result, isomers are substances that display isomerism.
• The Greek words "isos" and "meros," which mean "equal pieces," are the source of the English word "isomer."

In case of $\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_2{\mathrm{Cl}}_2\right]$:

• $\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_2{\mathrm{Cl}}_2\right]$ complexes central metal atom i.e.${\mathrm{Ni}}^{+2}\mathrm{is}{\mathrm{sp}}^3$ hybridized & such tetrahedral complexes do not show either geometric or optical isomerism.

Final Answer: Therefore, Option D is the correct option.