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Why is Cr2+ reducing and Mn3+ oxidising when both have d 4 configuration?

Why is Cr2+ reducing and Mn3+ oxidising when both have d 4 configuration?

 
 
Grade:12th pass

2 Answers

Upendra Yadav
33 Points
6 years ago
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.
suvidhi mehta
292 Points
6 years ago
since Cr+3 is more stable and Mn+2 is more stable due to full filled t2g orbitals and half filled configurations respectively

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