NEET 2011 Chemistry question
The d-electron configurations of , , and are , , and respectively. Which one of the following will exhibit minimum paramagnetic behaviour ?
(At. nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)
Answer: (3)
Solution
is a weak-field ligand, so all four complexes are high spin, and paramagnetism increases with the number of unpaired electrons. (): 4 unpaired; (): 5 unpaired; (, one
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