JEE Main Chemistry question

is a strong field ligand. This is due to the fact that **[Manipal 2007]**

(A)It carries a negative charge
(B)It is a pseudohalide
(C)It can accept electrons from the metal species (strong -acceptor / back-bonding ability)Correct
(D)It forms high-spin complexes with metal species

Answer: (C)

Solution

Beyond simple -donation, has empty orbitals that accept electron density back from filled metal -orbitals (synergic -back-bonding). This additional -acceptor

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Question ID VK-155402