title: O2 activation by metal-ligand cooperation with Ir(I) PNP pincer complexes.
abstract: A unique mode of molecular oxygen activation, involving metal-ligand cooperation, is described. Ir pincer complexes [((t)BuPNP)Ir(R)] (R = C6H5 (1), CH2COCH3 (2)) react with O2 to form the dearomatized hydroxo complexes [((t)BuPNP*)Ir(R)(OH)] ((t)BuPNP* = deprotonated (t)BuPNP 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.
authors.affiliation: Departments of †Organic Chemistry and ‡Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: Moran
authors.initials: M
authors.lastname: Feller
authors.affiliation: Departments of †Organic Chemistry and ‡Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: Eyal
authors.initials: E
authors.lastname: Ben-Ari
authors.affiliation: Departments of †Organic Chemistry and ‡Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: Yael
authors.initials: Y
authors.lastname: Diskin-Posner
authors.affiliation: Departments of †Organic Chemistry and ‡Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: Raanan
authors.initials: R
authors.lastname: Carmieli
authors.affiliation: Departments of †Organic Chemistry and ‡Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: Lev
authors.initials: L
authors.lastname: Weiner
authors.affiliation: Departments of †Organic Chemistry and ‡Chemical Research Support, Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: David
authors.initials: D
authors.lastname: Milstein