Cyclooctadiene iridium methoxide dimer

Cyclooctadiene iridium methoxide dimer
Names
	Other names bis[(cyclooctadiene]di-μ-methoxydiiridium
Identifiers
CAS Number	12148-71-9;
3D model (JSmol)	Interactive image;
ChemSpider	21241875;
ECHA InfoCard	100.156.683
PubChem CID	53216975 with error;
	InChI InChI=1S/2C8H12.2CH3O.4CH3.2Ir/c21-2-4-6-8-7-5-3-1;21-2;;;;;;/h21-2,7-8H,3-6H2;21H3;41H3;;/b22-1-,8-7-;;;;;;;; Key: KIQXVKYWEDSHED-SXGOCSEPSA-N;
	SMILES CO1[Ir](O([Ir]1(C)C)C)(C)C.C1/C=C\CC/C=C\C1.C1/C=C\CC/C=C\C1;
Properties
Chemical formula	C18H30Ir2O2
Molar mass	662.870 g·mol−1
Appearance	yellow solid
Density	2.552 g/cm3
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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Cyclooctadiene iridium methoxide dimer is an organoiridium compound with the formula Ir₂(OCH₃)₂(C₈H₁₂)₂, where C₈H₁₂ is the diene 1,5-cyclooctadiene. It is a yellow solid that is soluble in organic solvents. The complex is used as a precursor to other iridium complexes, some of which are used in homogeneous catalysis.^[1]

The compound is prepared by treating cyclooctadiene iridium chloride dimer with sodium methoxide.^[2] In terms of its molecular structure, the iridium centers are square planar as is typical for a d⁸ complex. The Ir₂O₂ core is folded.^[3]

References

^ Li, Hongbo; Colacot, Thomas J. (2010). "Di-μ-methoxobis(1,5-cyclooctadiene)diiridium(I)". Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rn01167. ISBN 978-0471936237..
^ Uson, R.; Oro, L. A.; Cabeza, J. A. (1985). "Dinuclear Methoxy, Cyclooctadiene, and Barrelene Complexes of Rhodium(I) and Iridium(I)". Inorganic Syntheses. Vol. 23. pp. 126–130. doi:10.1002/9780470132548.ch25. ISBN 9780470132548.
^ Carlton, Laurence; Nyoni, Michelle S.; Fernandes, Manuel A. (2016). "Triazenide complexes of iridium. Evidence for [Ir(η¹-N³Ph²)(HN³Ph²)(1,5-cod)], Structures of [Ir₂(μ-OMe)₂(1,5-cod)₂], [Ir₂(μ-N₃Ph₂)₂(1,5-cod)₂], [Ir(η²-N₃Ph₂)(H)(SiPh₃)(1,5-cod)], [Ir(η²-N₃Ph₂)(H)(SnPh₃)(1,5-cod)] and [Ir(η²-N₃Ph₂)(SC₆F₅)₂(1,5-cod)]". Polyhedron. 119: 194–201. doi:10.1016/j.poly.2016.03.022.

[1] Li, Hongbo; Colacot, Thomas J. (2010). "Di-μ-methoxobis(1,5-cyclooctadiene)diiridium(I)". Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rn01167. ISBN 978-0471936237..

[2] Uson, R.; Oro, L. A.; Cabeza, J. A. (1985). "Dinuclear Methoxy, Cyclooctadiene, and Barrelene Complexes of Rhodium(I) and Iridium(I)". Inorganic Syntheses. Vol. 23. pp. 126–130. doi:10.1002/9780470132548.ch25. ISBN 9780470132548.

[3] Carlton, Laurence; Nyoni, Michelle S.; Fernandes, Manuel A. (2016). "Triazenide complexes of iridium. Evidence for [Ir(η¹-N³Ph²)(HN³Ph²)(1,5-cod)], Structures of [Ir₂(μ-OMe)₂(1,5-cod)₂], [Ir₂(μ-N₃Ph₂)₂(1,5-cod)₂], [Ir(η²-N₃Ph₂)(H)(SiPh₃)(1,5-cod)], [Ir(η²-N₃Ph₂)(H)(SnPh₃)(1,5-cod)] and [Ir(η²-N₃Ph₂)(SC₆F₅)₂(1,5-cod)]". Polyhedron. 119: 194–201. doi:10.1016/j.poly.2016.03.022.

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