Which of the following complex has a possibility to exist as...

Which of the following complex has a possibility to exist as meridional isomer?

Options

A $[ Co ( {NH}_{3}{)}_{3} ( {NO}_{2}{)}_{3} ]$
B $[ Pt ( {NH}_{3}{)}_{2}{Cl}_{2} ]$
C $[ Co ( en{)}_{2}{Cl}_{2} ]$
D $[ Co ( en{)}_{3} ]$

Correct answer

A. $[ Co ( {NH}_{3}{)}_{3} ( {NO}_{2}{)}_{3} ]$

Step-by-step solution

The type of the complex $\left[{MA}_{3}{B}_{3}\right]$ exhibit the geometrical isomerism fac-mer isomerism. When three ligands and the metal are in one plane, the isomer is said to be meridional, or mer.

$[ Co ( {NH}_{3}{)}_{3} ( {NO}_{2}{)}_{3} ]$ can show facial and meridional isomerism.

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