d-d transitions: d-d transitions are electronic transitions that occur between the molecular orbitals (MOs) that are mostly metal in character; specifically the orbitals that we think of as the d-orbitals of a transition metal complex.

Which of the following is DD transition?

Paramagnetism The complex compound which contains unpaired electrons shows paramagnetism while which contains paired electrons shows diamagnetism. The complex which contains unpaired electrons exhibit d-d transition and paramagnetism.

What is DD transition effect?

d-d Transitions

In a d–d transition, an electron in a d orbital on the metal is excited by a photon to another d orbital of higher energy. In complexes of the transition metals, the d orbitals do not all have the same energy. ... An example occurs in octahedral complexes such as in complexes of manganese(II).