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Coordination Compounds — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryCoordination Compounds3 Marks
Question
What is meant by unidentate, didentate and ambidentate ligands? Give two examples for each.
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Answer

Unidentate Ligand : The ligands which is attached to the metal ion by a donor atom is called unindentate ligand. Like- Cl-, H2O and NH3.
Didentate Ligand : The ligand which is attached to the metal ion by two donor atoms is called a didentate ligand. Like- C2O2 (oxalate) and H2N-CH2-CH2-NH2 (Ethane 1, 2-diamine).
Ambidentate Ligand : The ligand with can bound to a metal through two different atoms is called ambidentate ligands.
Example : NO2 and SCN- ions. NO2- ion can bind to the central atom through nitrogen and oxygen. Similarly, SCN- can bind to sulphur and nitrogen atom.
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