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What is meant by the chelate effect ? Give an example. |
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Answer» SOLUTION :When a didentate or a polydentate ligand coordinates with the central metal ion FORMING a five or a six membered ring, the effect is CALLED chelate effect. As a resuit, the stability of the complex increases. For examples, the complex of `Ni^(2+)` with en is more stable than with `NH_(3)`. `Ni^(2+)(aq)+6NH_(3)(aq)rArr[Ni(NH_(3))_(6)]^(2+),logbeta=8.61` `Ni^(2+)(aq)+3en(aq)rArr[Ni(en)_(3)]^(2+),logbeta=18.28` |
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