Information AboutTetrairidium Dodecacarbonyl |
| CATEGORIES ABOUT TETRAIRIDIUM DODECACARBONYL | |
| iridium compounds | |
| carbonyl complexes | |
| inorganic carbon compounds | |
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. STRUCTURE 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. PREPARATION It is prepared in two steps by reductive carbonylation of hydrated Iridium Trichloride . The first step give {Link without Title} -.Pergola, R. D.; Garlaschelli, L.; Matinengo, S. "Dodecacarbonyltetrairidium: Ir4(CO)12" Inorganic Syntheses, 1990, volume 28, pp. 245-247. ISBN 0-471-52619-3 :IrCl3 + 3 CO + H2O → {Link without Title} - + HCl- + CO2 + H+ :4 {Link without Title} - + 6 CO + 2 H2O → Ir4(CO)12 + 2 CO2 + 4 H+ + 8 Cl- REFERENCES http://www.webelements.com/webelements/compounds/text/Ir/C12Ir4O12-18827811.html http://arjournals.annualreviews.org/ |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|