Among the following, which are ambidentate ligands? (i) SCN− (ii) NO−3 (iii) NO−2 (iv) C2O2−4
A
(i) and (iii)
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B
(i) and (iv)
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C
(ii) and (iii)
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D
(ii) and (iv)
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Solution
The correct option is A (i) and (iii)
Ambidentate ligand has two or more donor atoms, but during complex formation, only one donor atom is attached to central metal. SCN− ion has donor atoms N and S. It links to metal as either M−SCN or M−NCS. NO−2 group has donor atoms N and O. It links to metal as either M−ONO or M−NO2.