10314. Pentamethylcyclopentadienyliridium(III) Dichloride Dimer

Nomenclature

CAS number: 12354-84-6
Di-μ-chlorodichlorobis[(1,2,3,4,5-η)-1,2,3,4,5-pentamethyl-2,4-cyclopentadien-1-yl]diiridium; bis(dichloro(η5-pentamethylcyclopentadienyl)iridium); di-μ-chloro-dichlorobis(pentamethylcyclopentadienyl)diiridium(III); dichloropentamethylcyclopentadienyliridium dimer; iridium pentamethylcyclopentadienyl dichloride dimer; [Cp*IrCl2]2; [Ir(Cp*)Cl2]2; [(η-C5Me5)IrCl2]2.
C20H30Cl4Ir2; mol wt 796.70.
C 30.15%, H 3.80%, Cl 17.80%, Ir 48.25%.

Description and references

Iridium complex; homogenous catalyst for a variety of synthetic transformations. Prepn: J. W. Kang et al., Chem. Commun. 1968, 1304 DOI; eidem, J. Am. Chem. Soc. 91, 5970 (1969) DOI; B. L. Booth et al., J. Organomet. Chem. 16, 491 (1969) DOI. Review of discovery and chemistry: P. M. Maitlis, Acc. Chem. Res. 11, 301-307 (1978) DOI. Crystal structure: M. R. Churchill, S. A. Julius, ibid. 16, 1488 (1977) DOI; and improved prepn: R. G. Ball et al., Inorg. Chem. 29, 2023 (1990) DOI. Synthetic applications in catalysis: K. Fujita, R. Yamaguchi, Synlett 2005, 560 DOI; N. A. Owston et al., Org. Lett. 9, 73 (2007) DOI; S. Whitney et al., ibid. 3299 DOI; V. S. Sridevi et al., Organometallics 26, 1157 (2007) DOI.

Chemical structure

Properties

Orange crystals from chloroform-benzene, mp >230° (dec) (Kang); also reported as crystalline peach solid from dichloromethane-hexane, mp >300° (Booth). Crystal density: 2.259 g/cm3. Air and moisture stable.

Use

Versatile catalyst in organic chemistry.