Question

why is :'(nicl4,;-)2paramagnetic?no38
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Answer 1

Answer:

This is due to a difference in the nature of ligands. Cl- does not cause the pairing of unpaired 3d electrons. Hence, [NiCl4]2- is paramagnetic. In Ni(CO)4, Ni is in the zero oxidation state i.e., it has a configuration of 3d8 4s2.