Question

Why lanthanides do not resemble transition elements in complex formation​ ? ​

Answer 1

Answer:

Complex formation by lanthanides is different from that of actinides. In lanthanides, the 4f orbitals are well shielded by the larger 5d and 6s orbitals and are deep inside the atom. So f orbitals do not participate in any bonding and complex formation is similar to that of transition metals.

Answer 2

Explanation:

Complex formation by lanthanides is different from that of actinides. In lanthanides, the 4f orbitals are well shielded by the larger 5d and 6s orbitals and are deep inside the atom. So f orbitals do not participate in any bonding and complex formation is similar to that of transition metals.