🧲 Kompleks hosil qiluvchi metallar
3d, 4d, 5d elementlari • Ion radiusi • Irving-Williams • Davr taqqoslash
📋 Kompleks hosil qiluvchi metallar haqida
d-elementlar — kompleks birikmalarning asosiy markaziy atomlari. Ular bo'sh d-orbitallarga ega bo'lgani uchun ligandlardan elektron juftlarini qabul qiladi (Lyuis kislotasi). 3d, 4d va 5d elementlari orasida kompleks hosil qilish qobiliyati ion radiusi, zaryad, elektron konfiguratsiya va CFSE ga bog'liq.
🗺️ Interaktiv metallar jadvali
3d metallar (birinchi qator)
4d metallar (ikkinchi qator)
5d metallar (uchinchi qator)
⚖️ 3d vs 4d vs 5d — taqqoslash
| Xususiyat | 3d metallar | 4d metallar | 5d metallar |
|---|---|---|---|
| Ion radiusi | Kichik (60-80 pm) | O'rtacha (70-90 pm) | Katta (70-100 pm) |
| Odatiy KS | 4, 6 | 6, 7 | 6, 7, 8, 9 |
| Δ₀ (nisbiy) | Kichik (~10 000 sm⁻¹) | Katta (~20 000 sm⁻¹) | Juda katta (~30 000 sm⁻¹) |
| Spin holati | HS yoki LS | Asosan LS | Faqat LS |
| Kinetik inertlik | Labil (tez almashinadi) | Inert (sekin) | Juda inert (eng sekin) |
| Rang intensivligi | Kuchsiz-o'rtacha | Kuchli (MLCT) | Juda kuchli (SOC) |
| Lyuminessensiya | Kam uchraydi (Fe — yo'q) | Bor (Ru — τ~1μs) | Kuchli (Os, Ir) |
| SOC (ξ, sm⁻¹) | Kuchsiz (~400) | Kuchli (~1000) | Juda kuchli (~3000-4000) |
| Eng muhim metall | Fe (gemoglobin) | Ru (fotokataliz) | Pt (sisplatin), Ir (OLED) |
| Misol kompleks | [Fe(H₂O)₆]²⁺ | [Ru(bpy)₃]²⁺ | [Ir(ppy)₃] |
📈 Irving-Williams qatori — barqarorlik
Irving-Williams qatori — ikki valentli 3d metallar komplekslarining barqarorlik tartibi. Bu qator CFSE va ion radiusi bilan izohlanadi.
Qator:
Mn²⁺ < Fe²⁺ < Co²⁺ < Ni²⁺ < Cu²⁺ > Zn²⁺
Cu²⁺ eng barqaror komplekslar hosil qiladi (Jahn-Teller stabillashuvi). Zn²⁺ da CFSE=0 — barqarorlik pasayadi.
📏 Ion radiusining KS ga ta'siri
3d metallar
Kichik radius (60-80 pm)
KS = 4 yoki 6
Ti³⁺ (67), Cr³⁺ (62), Fe²⁺ (78)
4d metallar
O'rtacha radius (70-90 pm)
KS = 6 yoki 7
Ru²⁺ (72), Rh³⁺ (67), Pd²⁺ (86)
5d metallar
Katta radius (70-100 pm)
KS = 6, 7, 8, 9
Pt²⁺ (80), Au³⁺ (85), Hg²⁺ (102)
✅ Asosiy xulosalar
- 3d metallar — eng ko'p o'rganilgan, KS asosan 4 yoki 6, HS/LS
- 4d/5d metallar — katta ion radiusi, yuqori KS, asosan LS, inert
- Irving-Williams qatori: Mn²⁺ < Fe²⁺ < Co²⁺ < Ni²⁺ < Cu²⁺ > Zn²⁺
- Eng muhim metallar: Fe (gemoglobin), Ru (fotokataliz), Pt (sisplatin), Ir (OLED)
- Ion radiusi ortishi bilan KS ham ortadi