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