Coordination Compounds 2 Question 63
65. $NiCl _2$ in the presence of dimethyl glyoxime (DMG) gives a complex which precipitates in the presence of $NH _4 OH$, 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
$(2004,4 M)$
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Solution:
Oxidation state of $Ni$ is $+2$ and hybridisation is $d s p^{2}$. $\mu=0$ (no unpaired electron) hence, diamagnetic.
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