c
c
Neutral dimethyl glyoxime does not act as ligand.

When \(Ni ^{2+}\) reacts with dimethyl glyoxime in presence of \(NH _{4} OH\), it produce dimethyl glyoximate then it form rozy red ppt.

\(Ni ^{2+}{ }_{( aq )}+2 dmg ^{-} \rightarrow\left[ Ni ( dmg )_{2}\right]\)

\(\quad\quad\quad\quad\quad\quad\quad\quad\quad\)Rosy Red ppt.