Chemistry - Coordination Chemistry Question with Solution | TestHub

smaller cations prefer coordinate bonding due to greater polarizing power. ${\mathrm{Ti}}^{+3}=67\mathrm{pm}$ radius, ${\mathrm{Cr}}^{3+}=62\mathrm{pm}$ radius ${\mathrm{Mn}}^{+3}=65\mathrm{pm}$ radius, ${\mathrm{Fe}}^{+3}=65\mathrm{pm}$ radius So, ${\mathrm{Cr}}^{3+}$ has highest tendency to attract ligand.