Question

(NiC1,12 is paramagnetic while [Ni(CO),] is diamagnetic though both are tetrahedral. Why?
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Answer 1

Answer:

Though both [NiCl4]2− and [Ni(CO)4] are their magnetic characters are different. This is due to a difference in the nature of . Cl− is a weak field and it does not cause the pairing of unpaired 3d electrons. Hence, [NiCl4]2− is