[en] Reaction of [Ir₂(cyclooctene)₄Cl₂] with CO, NHEt₂, and PHPh₂ provides a synthetic route to the trinuclear, phosphido-bridged iridium clusters [Ir₃(μ-PPh₂)₃(CO)_nL₂] (n = 3, L = CO or PPh₃, L₂ = bis(diphenylphosphino)methane (dppm); n = 5, L = t-BuNC). The CO and PPh₃ complexes are analogues of previously known rhodium derivatives, and rhodium analogues of the dppm and t-BuNC complexes are also reported. The crystal structure of both the Ir and Rh complexes was determined and are reported. The molecular structure was also determined. Complete analyses of the ³¹P NMR spectra of the prepared complexes are also reported