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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