The maximum number of unpaired electrons possible in any octahedral complex of a transition metal ion is:

Name: The maximum number of unpaired electrons possible in any octahedral complex of a transition metal ion is:
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In an octahedral complex, the maximum number of unpaired electrons a transition metal ion can have is 5. This occurs when the d-orbitals are half-filled (d^5 configuration), such as in the case of Mn^2+ or Fe^3+, where all five d-orbitals have one electron each before any pairing occurs.

The Maximum Number of Unpaired Electrons Possible in Any Octahedral