Chlorobis(cyclooctene)iridium dimer is an
organoiridium compound with the formula Ir
2Cl
2(C
8H
14)
4, where C
8H
14 is ''cis''-
cyclooctene. Sometimes abbreviated Ir
2Cl
2(coe)
4, it is a yellow, air-sensitive solid that is used as a precursor to many other organoiridium compounds and catalysts.
The compound is prepared by heating an alcohol solution of sodium hexachloroiridate with cyclooctene in ethanol. The coe ligands are easily displaced by other more basic
ligands, more so than the diene ligands in the related complex
cyclooctadiene iridium chloride dimer. For example, with triphenylphosphine (PPh
3), it reacts to give IrCl(PPh
3)
3:
:Ir
2Cl
2(C
8H
14)
4 + 6 PPh
3 → 2 IrCl(PPh
3)
3 + 4 C
8H
14
References
{{Iridium compounds
Organoiridium compounds
Homogeneous catalysis
Alkene complexes
Dimers (chemistry)
Chloro complexes