十二羰基四铱

{{chembox
| Watchedfields = changed
| verifiedrevid = 385831378
| ImageFile = Ir4(CO)12.svg
| ImageSize =
| ImageFile1 = Tetrairidium-dodecacarbonyl-from-xtal-3D-balls.png
| IUPACName = dodecacarbonyl-1κ3C,2κ3C,3κ3C,4κ3C-[Td-(13)-Δ4-closo]-tetrairidium(6 Ir—Ir)
tetrahedro-tetrakis(tricarbonyliridium)(6 Ir—Ir)
| OtherNames =
|Section1=
|Section2={{Chembox Properties
| Formula = Ir4(CO)12
| MolarMass = 1104.92
| Appearance = 黄色晶体
| Density =
| MeltingPtC = 170
| Melting_notes=分解
:IrCl3 + 3 CO + H2O → [Ir(CO)2Cl2]− + CO2 + 2 H+ + Cl−
:4 [Ir(CO)2Cl2]− + 6 CO + 2 H2O → Ir4(CO)12 + 2 CO2 + 4 H+ + 8 Cl−

结构
每个铱原子是八面体型的，都和三个铱原子和三个 CO 配体配位。Ir4(CO)12 有 Td 对称，平均每个 Ir-Ir 键长为2.693 Å。相关的簇合物Rh4(CO)12 和 Co4(CO)12 都只有 C3v对称性，这是由于三个桥接 CO 配体而成。它是三方晶系的，空间群 P3 (No. 143)。

参考资料
*[https://www.webelements.com/compounds/iridium/tetrairidium_dodecacarbonyl.html www.webelements.com]
*[http://arjournals.annualreviews.org/ arjournals.annualreviews.org]