When $[CO ({CO}_{3}) {({NH}_{3})}_{4}]^{+}$ is reacted with $conc . HCl$ , then violet coloured $[{COCl}_{2} {({NH}_{3})}_{4}] Cl$ compound is formed. Predict the geometry of the product compound.

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Only cis - isomer

Only trans - isomer

cis $+$ trans isomer

Can't be predicted

answer is A.

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Detailed Solution

${CO}_{3}^{2 -}$ is acting as bidentate ligand, hence by its substitution by ${Cl}^{-}$ both ${Cl}^{-}$ will come at adjacent sites , hence only cis configuration is formed.

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