JEE MAIN - Chemistry (2002 - No. 30)

The type isomerism present in nitropentammine chromium $$\left( {{\rm I}{\rm I}{\rm I}} \right)$$ chloride is :
optical
linkage
ionization
polymerisation.

Explanation

The chemical formula of nitropentammine chromium $$\left( {{\rm I}{\rm I}{\rm I}} \right)$$ chloride is

$$\left[ {Cr{{\left( {N{H_3}} \right)}_5}\,N{O_2}} \right]C{l_2}$$

It can exist in following two structures

$$\left[ {Cr{{\left( {N{H_3}} \right)}_5}N{O_2}} \right]C{l_2}\,\,$$ and

nitropentammine chromium $$\left( {{\rm I}{\rm I}{\rm I}} \right)$$ chloride

$$\left[ {Cr{{\left( {N{H_3}} \right)}_5}ONO} \right]C{l_2}$$

Nitropentammine chromium $$\left( {{\rm I}{\rm I}{\rm I}} \right)$$ chloride

Therefore the type of isomerism found in this compound is linkage isomerism as nitro group is linked through $$N$$ as $$ - N{O_2}$$ or through $$O$$ as $$ - ONO.$$

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