Coordination Compounds — Chemistry STD 12 Science — Question

In presence of CN^–, (a strong ligand) the 3d electrons pair up leaving only one unpaired electron. The hybridisation is d²sp³ forming inner orbital complex. In the presence of H₂O, (a weak ligand), 3d electrons do not pair up. The hybridisation is sp³d² forming an outer orbital complex containing five unpaired electrons, thus greater the number of unpaired electrons more is the paramagnetic behavior.