hydrogen isotope exchange
![Iridium(I)-catalyzed regioselective C[BOND]H activation and hydrogen-isotope exchange of non-aromatic unsaturated functionality](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==)
Iridium(I)-catalyzed regioselective C[BOND]H activation and hydrogen-isotope exchange of non-aromatic unsaturated functionality
... Abstract: Isotopic labeling is a key technology of increasing importance for the investigation of new C-H activation and functionalization techniques, as well as in the construction of labeled molecules for use within ...
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Iridium-catalyzed Csp3-H activation for mild and selective hydrogen isotope exchange
... -H/T Exchange under Basic Conditions: C–H Activation of Unprotected ...S. Hydrogen Isotope Exchange with Highly Active Iridium(I) NHC/Phosphine Complexes: A Comparative Counterion ...
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Hydrogen isotope exchange with highly active iridium(I) NHC/phosphine complexes : a comparative counter-ion study
... [1] For reviews on hydrogen isotope exchange, see: (a) J. Atzrodt, V. Derdau, T. Fey, J. Zimmermann, Angew. Chem. Int. Ed. 2007, 46, 7744-7765; (b) P. H. Allen, M. J. Hickey, L. P. Kingston, D. J. ...
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Practically convenient and industrially-aligned methods for iridium-catalysed hydrogen isotope exchange processes
... iridium-catalysed hydrogen isotope exchange reaction with developing phosphine/NHC Ir(I) complexes has identified reaction media which are more widely applicable and industrially acceptable than the ...
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The synthesis of highly active iridium(I) complexes and their application in catalytic hydrogen isotope exchange
... in hydrogen isotope exchange ...allowed isotope incorporation over a range of substrates with the use of practically convenient deuterium and tritium ...of isotope incorporation to ...
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The development and use of novel iridium complexes as catalysts for ortho-directed hydrogen isotope exchange reactions
... As detailed here, this collaborative programme of work has revealed the considerable efficiency and general applicability of the specific group of novel iridium(I) complexes 4a-c within iridium-catalysed C-H activation ...
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Site-selective deuteration of N-heterocycles via iridium-catalyzed hydrogen isotope exchange
... years, hydrogen isotope exchange (HIE), via metal-catalyzed C − H activation, has been widely adopted as a key method for the synthesis of isotopically labeled compounds, allowing late-stage ...
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Anion effects to deliver enhanced iridium catalysts for hydrogen isotope exchange processes
... in hydrogen isotope exchange has demonstrated improved catalytic activity at lower catalyst loadings in the order X = BArF ≈ OTf > PF 6 > BF 4 ...
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Iridium(I)-catalyzed Regioselective C-H Activation and Hydrogen Isotope Exchange of Non-aromatic Unsaturated Functionality
... and hydrogen isotope exchange, we looked to further explore the capabilities of our developed system by extending the substrate scope (Table ...
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C–H functionalization for hydrogen isotope exchange
... involving hydrogen isotopes makes their installation an important and continuing challenge to synthetic ...transformation, hydrogen isotope exchange requires a continually evolving preparative ...
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Expanded applicability of iridum(I) NHC-phosphine catalysts in hydrogen isotope exchange processes with pharmaceutically-relevant heterocycles
... We then expanded this study to investigate the directing group ability of benzannulated substrates, 13–15 (Table 2, rows 1-2). In competition experiments between each benzannulated substrate (13 vs. 14, 13 vs. 15, and 14 ...
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Photochemical and Dynamics Studies of Oxygen Isotope Exchange Reactions of CO2
... triplet and singlet) within this energy range [Kowalczyk and Krylov, 2007; Liu et al., 2009], the possibility of vibronic effects due to Jahn-Teller-like distortion, and the failure of density- functional methods to ...
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Overview of the JET preparation for deuterium–tritium operation with the ITER like-wall
... beam deposition calculation, and determines the average fast ion slowing down rate ignoring finite thermal ion temperature effects. The orbit-averaged radial displacement due to the first orbit is estimated, after which ...
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Post mortem oxygen isotope exchange within cultured diatom silica
... silica/biovolume, it is reasonable to assume that frustules of these two diatom taxa also differ in their surface area/mass ratio, which in turn has been demonstrated to influence silica dissolution rate. 35,36 We ...
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Stable oxygen and hydrogen isotope fractionation factors for the Goethite (hematite)-water system
... Moderate to low temperatures synthesis experiments may never reach isotopic equilibrium due to the extremely low rates of mineral-water exchange [4] so -T relation at lower temperature may not represent the true ...
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Effects of Hydrogen Negative Ions on Plasma with Magnetic Field Decreasing toward a Wall
... a hydrogen negative ion (H − ) produced by the reaction of a vibrationally excited hydrogen molecule and an electron contributes the charge exchange recombi- nation process between the ...
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Carbon and Hydrogen Isotopes as Tracers of Methane Dynamic in Wetlands
... [28] Coleman, D.D., Liu, C.L., Hackley, K.C. and Benson, L.J. (1993) Identification of Landfill Methane Using Carbon and Hydrogen Isotope Analysis. Proceedings of 16th International Madison Waste ...
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ABSTRACTS: October 1962153-160
... Ni/A1,0, has a similar catalytic activity to Pt black and Pd black in this exchange reaction, but with Ni lSi0 and Nilkieselguhr there is no exchange of hydrogen in the be[r] ...
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The influence of oxygen isotope exchange between CO2 and H2O in natural CO2-rich spring waters : implications for geothermometry
... oxygen isotope exchange with CO 2 , high temperature equilibration with bedrock minerals and mineral dissolution and precipitation reactions on the CO 2 -rich water isotopic ...oxygen isotope ranges ...
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Identifying Karst Aquifers Recharge Area Using Environmental Isotopes: Case Study in Central Italy
... GW8 and GW9) shows a similar isotopic composition, suggesting the same recharge area. The same approach can be applied to GW1, GW2 and GW3 springs, whose isotopic values are depicted as a group. Lastly, water samples ...
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