O<sub>2</sub> Activation by Metal–Ligand Cooperation with Ir<sup>I</sup> PNP Pincer Complexes
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A unique mode of molecular oxygen activation, involving metal–ligand cooperation, is described. Ir pincer complexes [(tBuPNP)Ir(R)] (R = C6H5 (1), CH2COCH3 (2)) react with O2 to form the dearomatized hydroxo complexes [(tBuPNP*)Ir(R)(OH)] (tBuPNP* = deprotonated tBuPNP ligand), in a process which utilizes both O-atoms. Experimental evidence, including NMR, EPR, and mass analyses, indicates a binuclear mechanism involving an O-atom transfer by a peroxo intermediate.
创建时间：
2016-02-13
