Coordination Compounds

Short Answer Type

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A coordination compound has the formula CoCl3.4NH3. It does not liberate NH3 but forms a precipitate of AgCl on treatment with AgNO3 solution. Write the structure and IUPAC name of the complex.

[CoCl2(NH3)4]Cl. Its IUPAC name is tetramine dichloro cobalt(III) chloride.
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    (ii) K3[    Cr(CN)6]

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    [Fe(CN)6]3– is weakly paramagnetic while [Fe(CNO)6]4– is diamagnetic, why?
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