Question

5. Draw qualitatively energy-level diagram showing d-orbital splitting in the octahedral environment. Predict the number of unpaired electrons in the
complex [Fe(CN)6,]4-“. Is the complex diamagnetic or paramagnetic? Is it coloured? Explain.
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Answer 1

Explanation:

Fe=1s2,2s2,2p6,3s2,3p6,4s2,4d6

Fe^+2=1s2,2s2,2p6,3s2,3p6,4s0,4d6

due to the presence of unpaired electron it is diamagnetic ,yes it is coloured