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Q. The hypothetical complex chloro diaquatriammine cobalt (III) chloride can be represented as :-

Punjab PMETPunjab PMET 2007Coordination Compounds

Solution:

Chlorodiaquatriamminecobalt (III) chloride is $\left[ CoCl \left( NH _3\right)_3\left( H _2 O \right)_2\right] Cl _2$. Since Co has $+3$ charge so 2 chloride ion will be out of the complex ion and 1 within the complex to satisfy primary valency.