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    Coordination Compounds
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    Explain why chelating complex is more stable than unchelated complex?

    Chelating ligand can form a ring with central metal. Therefore it have ability to regulate electron with in ring. Because of it there is more force of attraction between central metal ion chelating agent, therefore, they are more stable.
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    Write down the IUPAC names of the following compounds:

    (i) [CO(NH3)5ONO ]Cl2     
    (ii) K3[    Cr(CN)6]

    (i) Penta amine nitrito cobalt(III) chloride.
    (ii) Potassium hexa cyanochromate (III).

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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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    [Fe(CN)6]3– is weakly paramagnetic while [Fe(CNO)6]4– is diamagnetic, why?
    Paramagnetic Character depend on the number of unpaired electron. In the [Fe(CN)6]3– has 1 unpaired electron, therefore, it is paramagnetic whereas [Fe(CN)6]3– is diamagnetic because it does not have unpaired electron.
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    Write the IUPAC name for  [Cr(NH3)5 CO3]Cl.

    Penta amine carbonato chromium(II) chloride.
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