Phổ hấp thụ electron Giản đồ Tanabe - Sugano S() 1 A1g Eg T2g A1g G(9) T1g 1 P(9) A1g Eg Eg x Eg = Eg + A1g + A2g A2g T1g Eg D(5) T1g T2g T2g A2g ∆ο T1g 3 F(21) eg T2g T2g t2g1eg T2g x Eg = T1g + T2g T1g A1g 1 Eg T2g T1g ∆ο t2g T2g x T2g = T1g + T2g + Eg + A1g T2g G = A1g + Eg + T1g + T2g G(18) Eg T1g ∆ο A2g F(21) T2g T1g t2g3eg t2g2eg ∆ο Eg t2g1eg T1g → 3T2g T1g T1g → 3T1g → 3A2g A2g → 2T1g 2Eg A2g → 4T2g A2g A2g A2g → 2T2g → 4T1g → 4T1g (P) Ag → 3T1g → 3T2g Ag → 1T1g Ag → 1T2g Ag 1 T2g → 5E1g A2g → 3T2g A2g → 1Eg A2g → 3T1g A2g → 1T2g A2g → 3T1g(P)