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Question

Magnetic moment (spin only) of octahedral complex having CFSE=0.8Δo and surrounded by weak field ligands can be :

A
15 BM
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B
8 BM
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C
A and B
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D
None of the above
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Solution

The correct option is B A and B
The octahedral complex with CFSE=0.8Δo surrounded by weak field ligands can have one or more unpaired electrons.

The spin only magnetic moment is given by the formula μeff=n(n+2)B.M..

For two unpaired electrons, the expression becomes μeff=2(2+2)B.M.=8B.M..

For three unpaired electrons, the expression becomes μeff=3(3+2)B.M.=15B.M..

Thus, both options A and B are correct.

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