UB-Vis TahlilOktaedrik Ohd³Paramagnit (n=3)INERT (t½≈80 soat)Δo=17,400 cm⁻¹
[Cr(H₂O)₆]³⁺
160.07 g/molgeksaakvaxrom(III) ioni — d³ inert kompleks
UB-Vis spektrida ikkita d-d polosa kuzatiladi: ν₁ = 17,400 cm⁻¹ (575 nm) — ⁴A₂g → ⁴T₂g, ν₂ = 24,600 cm⁻¹ (407 nm) — ⁴A₂g → ⁴T₁g(F). Cr³⁺ (d³, t₂g³) — ν₁ = Δo (to'g'ridan-to'g'ri spektrdan!). KMBE = −1.2Δo — yuqori barqarorlik, t½ ≈ 80 soat. ν₂/ν₁ = 1.414 — Tanabe-Sugano dan Δo/B ≈ 24.7, B ≈ 704 cm⁻¹.
Erituvchi: H₂OKonsentratsiya: ~10⁻² MKyuveta: 1 cmHarorat: 25°C
📈 UB-Vis Spektri — [Cr(H₂O)₆]³⁺
Grafik sxematik. d-d o'tishlar Laporte-taqiqlangan — ε juda kichik (~15−20).
575 nm⁴A₂g → ⁴T₂g (ν₁)
407 nm⁴A₂g → ⁴T₁g(F) (ν₂)
265 nm⁴A₂g → ⁴T₁g(P) (ν₃) + CT
Asosiy xulosalar
- ν₁=Δo=17,400 cm⁻¹ — d³ da to'g'ridan-to'g'ri spektrdan
- ν₂/ν₁=1.414 → Δo/B≈24.7 → B=704 cm⁻¹, β=0.68
- Binafsha rang — sariq nur yutilishi hisobiga
- INERT: KMBE=−1.2Δo, t½≈80 soat