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Why do lanthanides have less tendency to form complexes and are less basic when compared to actinoid elements?

7 years ago


Answers : (1)


Dear shailja,

They do not form Ln=O or Ln≡N multiple bonds of the type known for many transition
metals and certain actinides.Unlike the actinides, they do not form stable carbonyls and have (virtually) no chemistry in the 0 oxidation state.The 4f orbitals in the Ln3+ ion do not participate directly in bonding, being well shielded by the 5s2 and 5p6 orbitals. Their spectroscopic and magnetic properties are thus largely uninfluenced by the ligand.

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