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.