In which case geometrical isomer cis is possible with $M$ as a metal central ion if complexes are square planar having coordination number $4$ ?

_{2}

_{2}

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_{2}

_{4}

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_{2}

_{2}

_{2}

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_{4}

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Solution

The correct option is A Ma $_{2}$ b $_{2}$
The square planer complexes having coordination number 4 exhibit geometrical isomerism or cis-trans isomerism.

Square planar complex of type $M a_{4}$ does not show geometrical isomerism because all the ligands are same.

$M a_{2} b_{4}$ and $M a_{2} b_{2} c_{2}$ are octahedral complexes with coordination number 6.

$M a_{2} b_{2}$ show cis-trans isomerism due to two different type of ligands.

Hence, the correct option is (A).

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In which case geometrical isomer cis is possible with M as a metal central ion if complexes are square planar having coordination number 4?

In which case geometrical isomer cis is possible with $M$ as a metal central ion if complexes are square planar having coordination number $4$ ?