Question

Why lanthanides have poor tendency to form complexes?

Answer 1

Complex formation. The lanthanidesdo not show much tendency to form complexes due to low charge density because of their size. However, thetendency to form complex and their stability increases with increasing atomic number.

Answer 2

Lanthanides have a lot of less tendency to create complexes than actinides.

• Because of higher effective nuclear charge and smaller size of atoms the actinides have higher charge density and since of that they need larger tendency to create complexes than the lanthanides.
• Lanthanides area unit the group parts of the fashionable tabular array i.e.  With atomic numbers from fifty eight to seventy one following the element La. They' are known as group metals
• Because of the smaller size however higher nuclear charge, tendency to create coordinate. Complexes will increase from La3+ to Lu3+.
• Lanthanide from complexes with chelating ligands
• Such as, EDTA, Oximes, Beta Ketones
• Lanthanides type complexes solely with atomic number 8 and F donor ligands
• Lanthanides don't type complexes with pi-bonded ligands

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