WHICH OF THE FOLLOWING coordination entities has maximum CFSE in octahedral field?[Co(CN)6]3-OR[Co(C2O4)3]3-

The magnitude of cfse depends on three factorsNature of ligandCharge in metal ionWhether metal belongs to 1st,2nd or third transition seriesHere,the central ion and the charge is same,the difference is in the ligand attached. CN is a strong field ligand while the c2o4 is a weak field ligand according to spectrochemical series and therofore the cfse would be maximum in [Co(CN)6]3- because the split would be more due to CN-ligand as comapred to [Co(c2o4)3]3- .

Approved