Which of these ligands is ambidentate — capable of binding through eit…

Question

Which of these ligands is ambidentate — capable of binding through either of two different donor atoms?

Accepted Answer

B. {'text': 'SCN⁻', 'label': 'B'}

1. Ambidentate ligands have two different donor atoms but bind through only one at a time.
2. SCN⁻ can bind via sulphur (thiocyanato-S) or via nitrogen (isothiocyanato-N).
3. NO₂⁻ is the other classic ambidentate example (nitro-N or nitrito-O).
4. NH₃, H₂O and Cl⁻ each have only one donor atom, so they are unidentate.
_Source: NCERT Class 12 Chemistry, Unit 5 "Coordination Compounds", §5.2(c)_

Answer

{'text': 'NH₃', 'label': 'A'}

Answer

{'text': 'Cl⁻', 'label': 'C'}

Answer

{'text': 'H₂O', 'label': 'D'}