|Molar mass||1104.92 g/mol|
|Melting point||195 °C|
|Solubility||Chlorocarbons, toluene, tetrahydrofuran|
|Related compounds||Tetrarhodium dodecacarbonyl|
| (what is: / ?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Tetrairidium dodecacarbonyl is the chemical compound with the formula Ir4(CO)12. This tetrahedral cluster is the most common and most stable "binary" carbonyl of iridium. This air-stable species is only poorly soluble in organic solvents. It has been used to prepare bimetallic clusters and catalysts, e.g. for the water gas shift reaction, and reforming, but these studies are of purely academic interest.
Each Ir center is octahedral, being bonded to 3 other iridium atoms and three CO ligands. Ir4(CO)12 has Td symmetry. The related clusters Rh4(CO)12 and Co4(CO)12 have C3v symmetry because of the presence of three bridging CO ligands in each. it is homotetranuclear carbonyl cluster containing four Ir-Ir bonds.each Iridium metal are linked to three terminal carbonyl groups.And in this structure each Ir metal linked to three other Ir atoms.
- 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−
- Pergola, R. D.; Garlaschelli, L.; Matinengo, S. (1990). "Dodecacarbonyltetrairidium: Ir4(CO)12". Inorganic Syntheses. Inorganic Syntheses (New York: J. Wiley & Sons) 28: 245–247. doi:10.1002/9780470132593.ch63. ISBN 0-471-52619-3.