title: Structural aspects of reversible molecular oxygen uptake.
abstract: The system IrX(CO)[P(C(6)H(5))(3)](2) in benzene solution adds mo lecular oxygen reversibly if X is chlorine and irreversibly if X is iodine. The crystal structure of the complex IrIO(2)(CO)[P(C(6)H(5))(3)](2) * CH(2)Cl(2) is reported here and compared with a previous study of the structure of IrClO(2)(CO)[P(C(6)H(5))(3)](2). The O-O bond length is 1.47 +/- 0.02 angstroms in the irreversibly oxygenated iodo-compound and 1.30 +/- 0.03 angstroms in the reversibly oxygenated chloro compound.
authors.forename: J A
authors.initials: JA
authors.lastname: McGinnety
authors.forename: R J
authors.initials: RJ
authors.lastname: Doedens
authors.forename: J A
authors.initials: JA
authors.lastname: Ibers