[Ilaria]

Spin-allowed transitions for d³ ions are the following: ⁴A_2g ⁴T_2g (F), ⁴A_2g ⁴T_1g (F), ⁴A_2g ⁴T_1g (P). Then we have the ⁴A_2g ²E_g spin-forbidden transition. My questions are:
1. What is the difference between ⁴T_2g (F) and ⁴T_1g (F) states and why are their energies different?
2. What electron configuration corresponds to ²E_g? What is the distribution of electrons in t_2g and e_g orbitals in this state?