Oxygen-carrying iridium complexes: kinetics, mechanism, and thermodynamics.
The rates of oxygenation and deoxygenation of a series of iridium complexes increase and decrease, respectively, with increasing electron-releasing tendency of the anionic ligands (A) attached to the metal atom in the oxygencarrying compounds, [IrA(CO)(Ph(3)P)(2)]. Calculated heats of oxygenation (-DeltaH(2)(0)), related to Ir-O(2) bond energies, are proportional to the previously reported O-O bond lengths in the oxygen adducts, [O(2)IrA(CO)(Ph(3)P)(2)].
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