2001
DOI: 10.1139/v01-055
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Reactions of SO2 with trans-Ir(CO)(Cl)(TPPTS)2 in water

Abstract: Reaction of SO 2 with trans-Ir(CO)(Cl)(TPPTS) 2 in water mirrors the nature of SO 2 dissolved in water. At low pH (pH = 1) where SO 2 exists as the hydrated species SO 2 ·H 2 O, only Ir(CO)(Cl)(SO 2 )(TPPTS) 2 forms. At higher pH (pH = 6) where HSO 3 -dominates, no SO 2 complex is observed and a hydride, Ir(CO)(Cl)(H)(OH)(TPPTS) 2 , is the primary product. A mixture of SO 2 and O 2 does not lead to an iridium sulfate or show any evidence of the dioxygen adduct upon reaction in water with trans-Ir(CO)(Cl)(TPPTS… Show more

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“…Aqueous organometallic catalysis provides a practical means of catalyst recovery and allows the design of green chemical processes by replacing organic solvents with water . So far, only a few studies have appeared on the synthesis and application of water-soluble Ir complex catalysts, and even fewer attempts have been made to obtain water-soluble Ir(I)-based hydrogenation catalysts. A case in point is the synthesis of [Ir(η 4 -cod)(PR 3 )(py)]PF 6 , where PR 3 is the water-soluble PEG-functionalized phosphine PEG-(OC 6 H 4 PPh 2 ) 2 , derived from poly(ethylene glycol) PEG-3400, and is presumed to coordinate as a monodentate ligand .…”
Section: Introductionmentioning
confidence: 99%
“…Aqueous organometallic catalysis provides a practical means of catalyst recovery and allows the design of green chemical processes by replacing organic solvents with water . So far, only a few studies have appeared on the synthesis and application of water-soluble Ir complex catalysts, and even fewer attempts have been made to obtain water-soluble Ir(I)-based hydrogenation catalysts. A case in point is the synthesis of [Ir(η 4 -cod)(PR 3 )(py)]PF 6 , where PR 3 is the water-soluble PEG-functionalized phosphine PEG-(OC 6 H 4 PPh 2 ) 2 , derived from poly(ethylene glycol) PEG-3400, and is presumed to coordinate as a monodentate ligand .…”
Section: Introductionmentioning
confidence: 99%