 A closely related but still more reactive complex is chlorobis(cyclooctene)rhodium dimer.The molecule consists of a pair of square planar Rh centers bound to a 1,5-cyclooctadiene and two chloride ligands that are shared between the Rh centers.The Rh2Cl2 core is also approximately planar, in contrast to the highly bent structure of cyclooctadiene iridium chloride dimer where the dihedral angle is 86°.