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(a) What is a ligand ? Give an example of a bidentate ligand. (b) Explain as to how the two complexes of nickel, [Ni(CN)_(4)]^(2-)andNi(CO)_(4) have different structures but do not differ in their magnetic behaviour. (Ni = 28) |
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Answer» Solution :(a) Ligands - The ions or molecules BOUND to the central atom / ion in the coordination ENTITY are CALLED ligands. Example of a bidenate ligand : `H_(2)N CH_(2)CH_(2)NH_(2)`(ethylenediamine) (b) `[Ni(CN)_(4)]^(2-)` is a square planar complex which is diamagnetic as no unpaired electron is present. `[Ni(CO)_(4)]` is a tetrahedral complex which is diamagnetic due to absence of unpaired ELECTRONS. |
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