Coordination CompoundshardMCQ SINGLE

In the qualitative analysis detection of , a rosy-red precipitate is formed. The complex exhibits exCoordination Compounds Chemistry Question

Question

In the qualitative analysis detection of $Ni^{2+}$, a rosy-red precipitate is formed. The complex $[Ni(dmg)_2]$ exhibits extraordinary stability. This extra stability is primarily attributed to:

Answer: D

💡 Solution & Explanation

The rosy-red precipitate of bis(dimethylglyoximato)nickel(II) is a square planar complex. Its exceptional stability arises because the two $dmg^-$ ligands form strong intramolecular hydrogen bonds (O-H...O) between themselves, effectively locking the complex into a stable pseudo-macrocyclic ring system.

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