Chlorobis(cyclooctene)iridium dimer

Chlorobis(cyclooctene)iridium dimer
Names
	IUPAC name Chlorobis(cyclooctene)iridium(I) dimer
	Other names Di-μ-chlorotetrakis(cyclooctene)diiridium(I), [Ir(coe)2Cl]2
Identifiers
CAS Number	12246-51-4;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.159.657
PubChem CID	91972094;
CompTox Dashboard (EPA)	DTXSID001045899 ;
	InChI InChI=1S/4C8H14.2ClH.2Ir/c41-2-4-6-8-7-5-3-1;;;;/h41-2H,3-8H2;21H;;/p-2/b42-1-;;;; Key: CJJIQMGSHWWMCK-XFCUKONHSA-L;
	SMILES C1CCCC=CCC1.C1CCCC=CCC1.C1CCCC=CCC1.C1CCCC=CCC1.[Cl-].[Cl-].[Ir].[Ir];
Properties
Chemical formula	C32H56Cl2Ir2
Molar mass	896.13
Appearance	yellow solid
Melting point	160-165 °C
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P280, P304+P340, P305+P351+P338, P321, P332+P313, P362, P403+P233, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chlorobis(cyclooctene)iridium dimer is an organoiridium compound with the formula Ir₂Cl₂(C₈H₁₄)₄, where C₈H₁₄ is cis-cyclooctene. Sometimes abbreviated Ir₂Cl₂(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.^[2] 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 (PPh₃), it reacts to give IrCl(PPh₃)₃:^[3]

Ir₂Cl₂(C₈H₁₄)₄ + 6 PPh₃ → 2 IrCl(PPh₃)₃ + 4 C₈H₁₄

References

^ ^a ^b "Chlorobis(cyclooctene)iridium Dimer SDS". American Elements. Retrieved 2018-08-24.
^ van der Ent, A.; Onderdelinden, A. L. (1973). Chlorobis(cyclooctene)rhodium(I) and -Iridium(I) Complexes. Inorganic Syntheses. Vol. 14. pp. 92–95. doi:10.1002/9780470132456.ch18. ISBN 978-0-470-13174-9.
^ Bennett, M. A.; Latten, J. L. (1989). "An Iridium(III) Complex Containing Cyclometallated Triphenylphosphine Formed by Isomerization of an Iridium(I) Triphenylphosphine Complex". Inorganic Syntheses. Vol. 26. pp. 200–203. doi:10.1002/9780470132579.ch35. ISBN 978-0-471-50485-6.

[sds-1] "Chlorobis(cyclooctene)iridium Dimer SDS". American Elements. Retrieved 2018-08-24.

[2] van der Ent, A.; Onderdelinden, A. L. (1973). Chlorobis(cyclooctene)rhodium(I) and -Iridium(I) Complexes. Inorganic Syntheses. Vol. 14. pp. 92–95. doi:10.1002/9780470132456.ch18. ISBN 978-0-470-13174-9.

[3] Bennett, M. A.; Latten, J. L. (1989). "An Iridium(III) Complex Containing Cyclometallated Triphenylphosphine Formed by Isomerization of an Iridium(I) Triphenylphosphine Complex". Inorganic Syntheses. Vol. 26. pp. 200–203. doi:10.1002/9780470132579.ch35. ISBN 978-0-471-50485-6.

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