Why is cr2+ reducing and mn3+ oxidising when both have d4 configuration?
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Cr2+ is reducing as its configuration changes from d 4 to d 3 , the latter having a half-filled t2g level .
On the other hand, the change from Mn3+ to Mn2+ results in the half-filled (d 5 ) configuration which has extra stability.
On the other hand, the change from Mn3+ to Mn2+ results in the half-filled (d 5 ) configuration which has extra stability.
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