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A Group IV transition metal cation M ²⁺ reacts with dimethylglyoxime in an ammoniacal medium to yield a brilliant red precipitate of a complex. The hybridization and the magnetic nature of the central metal atom in this complex are respectively:

Options

  1. Asp ³ , paramagnetic
  2. Bsp ³ , diamagnetic
  3. Cdsp ² , paramagnetic
  4. Ddsp ² , diamagnetic

Correct answer

D. dsp ² , diamagnetic

Step-by-step solution

The formation of a brilliant red precipitate with dimethylglyoxime (DMG) in an ammoniacal medium indicates that the metal cation M ²⁺ is Ni ²⁺ . The complex formed is bis(dimethylglyoximato)nickel(II), [ Ni ( DMG )₂] . In this complex, Nickel is in a +2 oxidation state with a 3 d ⁸ electronic configuration. Although DMG is generally a weak field ligand, in this specific complex it acts as a strong field ligand due to the extra stability provided by intramolecular hydrogen bonding between the two DMG ligands. This c

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