O2 Activation by Metal-Ligand Cooperation with IrI PNP Pincer Complexes

Moran Feller; Eyal Ben-Ari; Yael Diskin-Posner; Raanan Carmieli; Lev Weiner; David Milstein

doi:10.1021/jacs.5b01585

O₂ Activation by Metal-Ligand Cooperation with Ir^I PNP Pincer Complexes

Moran Feller, Eyal Ben-Ari, Yael Diskin-Posner, Raanan Carmieli, Lev Weiner, David Milstein

Weizmann Institute of Science, Israel

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	4634-4637
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	137
Issue number	14
DOIs	https://doi.org/10.1021/jacs.5b01585
Publication status	Published - Apr 15 2015

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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title = "O2 Activation by Metal-Ligand Cooperation with IrI PNP Pincer Complexes",

abstract = "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.",

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T1 - O2 Activation by Metal-Ligand Cooperation with IrI PNP Pincer Complexes

AU - Feller, Moran

AU - Ben-Ari, Eyal

AU - Diskin-Posner, Yael

AU - Carmieli, Raanan

AU - Weiner, Lev

AU - Milstein, David

PY - 2015/4/15

Y1 - 2015/4/15

N2 - 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.

AB - 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.

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