Question

$NiC{l}_2$ in the presence of dimethyl glyoxime (DMG) gives a complex which precipitates in the presence of $N{H}_{4}OH,$ giving a bright red colour.
(a) Draw its structure and show $H$-bonding
(b) Give oxidation state of $Ni$ and its hybridisation
(c) Predict whether it is paramagnetic or diamagnetic

Answer 1

Oxidation state of $Ni$ is $+2$ and hybridisation is $ds{p}^2.$
$\mu =0$ (no unpaired electron) hence, diamagnetic.