Which of the complex has the magnetic moment of 3.87 B.M.?
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[Co(NH 3 ) 6 ] +3 ; Oxidation state of cobalt is +3 and NH 3 is a strong field ligand. Therefore pairing will occur. There will be no unpaired electron. Therefore μ = 0.
[CoF 6 ] –3 ; Oxidation state of cobalt is +3 and F – is a weak field ligand. Therefore pairing will not occur. There will be 4 unpaired electron. Therefore μ = 4.92 BM.
[CoCl 4 ] –2 ; Oxidation state of cobalt is +2 and Cl – is a weak field ligand. Therefore pairing will not occur. There will be 3 unpaired electron. Therefore μ = 3.87 BM
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