Cyclooctadiene iridium methoxide dimer

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]

Cyclooctadiene iridium methoxide dimer
Names
Other names
bis[(cyclooctadiene]di-μ-methoxydiiridium
Identifiers
3D model (JSmol)
ECHA InfoCard 100.156.683
  • InChI=1S/2C8H12.2CH3O.4CH3.2Ir/c2*1-2-4-6-8-7-5-3-1;2*1-2;;;;;;/h2*1-2,7-8H,3-6H2;2*1H3;4*1H3;;/b2*2-1-,8-7-;;;;;;;;
    Key: KIQXVKYWEDSHED-SXGOCSEPSA-N
  • 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
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

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
  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. 23: 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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