Question

$N{i}^{2+}$ ion can be estimated by using dimethyl glyoxime and forms a cherry-red precipitate. The complex is stabilized by :

• A. Ionic bonds
• B. Coordinate covalent bonds
• C. Dative $\pi -bonds$
• D. Hydrogen bonds

Answer 1

Answer: (D)

Hydrogen bonds

$N{i}^{2+}$ reacts with dimethyl glyoxime to form a complex which has a cherry-red precipitate.It is stabilized by hydrogen bonding.

Two dmg ligands are linked to each other through hydrogen bonds.

$N{i}^{2+}+2DMG\underset{-2H_{2}O}{\overset{+2O{H}^{-}}{\to }}\underset{Cherryredprecipitate}{\left[Ni\right(DMG{)}_2]}$.